Bad news
1) Your insurance company will give you ‘fair value’ for your TT. Chances are repairs > value of the car so it will be totalled and written off with you receiving a check. Bad news is a 2001 TT isn’t worth enough to put you into a new car. Check NADA, Edmunds and KBB and be prepared to fight with the insurance company over value of your car.
I am not the guy who rushes to sue somebody but I would strongly consider it at this point. You’ll likely have to dig into your pockets for another car at no fault of your own.
I would caution you to be rational. Camaro SS is not a rational car. Also given what happened get something used with good crash scores. Good luck