What is minimum electrical required to start my car?

YES IT IS.... it is not hooked up on the inside... and it turned over by the key(many many times) before removing battery, now it don't... so didn't think that was a problem, but really dont know
even when it did turn over by the key i did not have fire, removed and reinstalled battery and now the key dont work yet jumping across the relay it turns over but yet still no fire