When you say clicking, do you mean when you turn the key the final turn to start the car it just clicks? Thats usually the solenoid getting stuck in the starter motor, you either have to carefully flick the ignition between 2/3 so its repeatedly trying to turn the starter (this usually unsticks it but difficult to get it right cause if u turn the key too much back ull have to start over) or hit the starter with a hammer that works as well.