There is a 100 Amp fuse in the under hood fuse block that looks like it's common to all the things that don't work but not involved for the things that do still work. It's not the easiest fuse to replace , it's bolted in to the fuse block- see johnsoax's posts on the second half of the first page of
http://forums.genvibe.com/zerothread?id=16307.No idea why a minor collision would break that fuse. One concern would be that there is a pinched wire somewhere , but I don't know where it would have to be to blow that fuse and not any of the ones between that fuse and the wires going to the rear end of the car. Maybe the impact affected the alternator. If you were rear-ended, then almost always the person that hit you is at fault, and their insurance should pay for the repairs. If that is an option, and you can spare the car long enough to have a shop fix it, then that might be the best route to take.However you get it fixed, please let us know what was broken, and what it took to fix it. Sorry to hear about the troubles. Glad it was a minor accident, and that you weren't hurt.