[kidrock]

old solenoid, bad grounds, or bad connection of yellow (solenoid) wire between ignition switch and starter. Aftermarket alarm systems are notorious.

Bump starts and jump starts will occasionally be necessary until you get it figured out. You can also get under the car and tap the solenoid with a tool to get it started...be careful not to touch the wires to the starter!!

Also: I've had past luck by using my alternator wrench to turn the motor to a point of low compression stroke, which seemed to make it easier for the starter to turn over. I later found out that the old aftermarket alarm system (and some very crappy wiring) were the culprits, which robbed the starter from receiving the full charge it needed to turn the beast over.

Good luck.