I found a full set of door panels with the speakers and tweeters still in the front panels . My car doesn't currently have the tweeters up front. What would I need to do do hook up the front speakers and tweeters up? Would I need crossovers for each door panel?

The stock speakers in my car, the 5 1/4 components, don't require crossovers. The tweeter has one built into it. Just splice the wire into two.

That makes it easy. They might still be hooked up like that. I will just have to wait and see.