First of all, welcome to CHR. Secondly, we need more info:

1) Did you ever have the car running?

2) If so, why did it stop or what changes did you make?

3) Year? Carb or Fuel Injection?

With some exceptions, all an engine needs to fire is fuel and spark. Have you checked to see if you have spark to the plugs. One of those $ 5 inline spark checkers can tell you that. If it lights up, you have spark.

If you have spark, try a little shot of starting fluid.

Give us the whole story so we have something to go on, otherwise all you are going to get is a lot of guesses.

Don