Did you manual try to start the car by jumping the connections on the starter? Did you check the starter relay? You need to get a repair manual with a wiring diagram and start at the ignition switch and work your way to the starter. If you have power coming out of the ignition switch in the the start position move to the next place in line. If you have power coming in and not out that is your problem if you have power coming out move to the next part inline and so on until you find what is not working.