92 Trofeo Starts when it wants to

I recently bought a 92 Toronado Trofeo and when I went to pick up the car it would not start. So we jumped the selinoid with a screw driver and it started right up. It wiil start for a few times with the key after being jumped and then it won't start again. I have cleaned the key and cleaned the ignition wth contact cleaner. I have also checked all of the cables and they look fine. When it decieds that it is not going to start the car rolls over once or twice and then it acts like it has a bad connection. I'm lost, any help is greatly appriciated.

Sounds like a starter issue, nothing other than bad connections or a bad starter cause this, assuming battery is good.