my car won't idle.

I have an 05 Saturn Vue. The car has sat for 7 months before I started to drive it. I got in it recently and the battery was dead. So we jumped it off and we had an check engine light on. I went and had an old change and got a new battery. They said at advanced that it looked like a sensor went bad just to replace the battery. After replacing the battery I got on the parkway to go home and the car shut off but the lights were still on. I had a battery light come on and a oil light. I just had the old changed and the battery replaced. Now the car won't idle and the only way your getting it anywhere is to keep your foot on the gas. I don't know what to do. Any suggestions on what it could be?:crying:

Is your vue a 6 cylinder or a 4 ?