Per Something Borrowed (I think that's the title. I don't have a reference handy) The marriage ceremony removes true love's protection. Once the wedding goes down, Harry has no protection from Lara ...

IIRC, that's specifically a Faerie/contractual thing (a marriage being (from the Fae POV) a very contractual affair (oaths &c:  "to have and to hold, forsaking all others, from this day forward, 'til death do us part...")).  I'd need to go back and read the story to be sure whether Harry was actually that specific in the exposition.

I doubt the Whampire Hunger is affected by the ceremony either way; I certainly wouldn't expect a loveless political marriage to convey any protections, so I don't see why a political marriage would end them.

I also think it is very hard to guess what Rashid's real age is, remember he spends 90% or more of his time at the Gates in the Nevernever, time works differently there ...

That's my point, yes:

I believe Rashid is the oldest WC wizard, and I suspect that comes from spending so long in extreme time-dilation at the Outer Gates & other deep-Nevernever regions.

I don't know that he spends "90%" (or any other specific number) of his time at the Outer Gates (afaik this isn't something that's ever been specified), but it's certainly a lot of his time... enough to hugely-extend the elapsed mortal-world time since his birth, without actually "aging" him.

But Rashid is at least 1300-ish years old, in terms of mortal-world-years-since-birth, per WoJ.  And I think (I'd have to go delving to be sure) we also have WoJ that wizards' lifespan is normally 400ish years.  That's a pretty notable discrepancy, whether taken as absolute years or as a multiplier.

... because he has spent most of those years in the Nevernever, his age appears to be or close to Eb's age..   

I think wizards go through a huge long plateau of general good health & fitness with very slow "apparent" aging, that begins in their mid/late 20's and lasts for around 300-350 years; then, when they finally begin to look "old" (apparent age 65ish?) they begin to age less-slowly (though still not fast) for another 50ish years.

AFAIK, there is no WoJ as to whether some kinds of magic (e.g. water-magic, which is related to healing), or an individual wizard's particular power (e.g. Harry is very-strong) get more of this benefit (whether "younger looks" or more actual years, etc) than others do.

I strongly suspect that two wizards' relative "apparent ages" are a very-poor way to figure out which is actually the elder of the two.
 

Also skating on very thin ice when he and Molly sparred mentally..

I don't think so, but maybe...?
They were working on developing their mental defenses; the only way to do that is by defending against mental attacks.  The "win condition" was a specific mental image, nothing with mental controls or outside impulses.

Now... could a very-subtle mind-mage like Molly have slipped some low-key "extras" in, unnoticed in the face of the larger contest?  Likely, to be honest.  I suspect that she did not, but I don't think we can be sure.

The whole practice (of practicing mental defenses (and thus of practicing mental attacks)) was deprecated in the White Council because it can slide so easily into law-breaking, and it can be so difficult to figure out the intent, when Something Goes Wrong.  But then the Captain of the Wardens had her mind kicked out of her own body by a Kemmlerite, and the WC secretary turned out to have been diddling the minds of most/all of the Senior Council & the Wardens... and they suddenly realized their "just say no" policy was so very head-in-the-sand that it bordered on being suicidal.

I think Harry training Molly was pretty safe... or as much so as such things ever can be.

In particular:  I don't think it's going to be the major Lawbreaking that Jim was intending when he said he'd have Harry break all 7 Laws.
 

... Kim has stated that Harry will brake all 7 laws at one point. I think he'll bring her back.

I suspect that either raising Sue, or the horde of vengeful spectres that took down Bianca, counts as "raising the dead."

He already got away with a killing, when he took out Justin.

Only 5 more to go!!!   

... My theory about the whole wedding situation is that is, like all of Mab's plans, a multi-purpose thing. I think in part it is about making powerful allies, in part is about isolating Harry or changing his focus, maybe about him making other types of allies, in part is about Molly and making her lose all hope of romance bewteen her and Harry, and it might also be about Mab needing something from the Raith's library that by Harry being close he could get for her, or even for himself, there's probably stuff that belonged to Margaret in there. But I really doubt is because there's a need for an "heir" or something as simple as that.

All of that, yes.
I think access to Papa Raith's library is on Mab's agenda (likely, as you suggest, to power-up Harry).
Further isolating Harry from his Mortal allies (Mab sees mortal ties as a weakness, after all).

The biggest one, I suspect, is that Mab wants to find the Whampire Nemfection-vector:  Papa-Raith had Outsider-fueled protections, and an Outsider-fueled curse (that the porn-starlet coven used), and Justine got Nemfected apparently from working closely with Lara.  Something seems to be rotten at the core of the White Court.

And -- oh look! -- Mab has a Starborn WK (just the thing for stomping on Outsiders!); time to toss a HarryDresdenGrenade into that bunker.

... in the scene where Lara and Harry are getting ready to rescue Thomas in the castle, they do touch and she burns. Harry makes explicit mention of it, check out Chapter 25 of Peace Talks.

Thank you, I'll check that out ...
 

as soon as I figure out where my walkabout copy of PT has gotten to...   

what? When did she do that?

Molly?  In White Night, with one of the early victims of the Whampires.  Harry took her to the morgue, and Waldo let her do her Sensitive thing.  It let Harry confirm there was a serial-killer.