1996 Pontiac Grand Prix my car wont start

We have eliminated that the motor in my car is still good, but my car wont start. I was recently hit in the front and rear end. The passenger side of my car in the front is damaged and one week later the back end of my car was hit. It will turn over, and there is spark in all of the plugs. I was told that there is an emergency fuel shut off. Now I dont know if that might have something to do with it and the shop it is sitting at is NOT helping me out determining the problem.