You are not supposed to take anything out of that car, that is BOLTED to the car.
This includes your new rubber/rims (or steelies). Give the receipt to the insurance company, and they may give you a portion or all of the price of the new rubber.
As for the deck, if you have the original receipt, see if the insurance company is willing to reimburse you.
Or if you're quick enough or the salvage yard guys don't care, go in and rip everything you want out, including the passenger seats
I had a friend remove ALL bulbs from his car, when it was totalled (well, the ones that worked anyway). If you're really anal, you may want to try to pump your gas out of the tank