Radio which wire is power to the CD player?

That changer is a part of the stereo itself, it gets its power through the same feed as the radio and there is no individual power feed for it. You would need to remove the unit and take it apart, then see if there is a way to disable the changer itself without damaging the radio or causing it to lock up. I don't believe it would work though because the changer isn't just an add on module but an integrated part. There are places that repair them, but I suspect that may be more money than if you just bought a replacement unit that works.

Whatever you want that will fit it. I suggest going to Crutchfield. Com and entering the vehicle info and see what they suggest. Pay attention to any conversion harness or wiring they talk about. Much easier when it's plug and play, plus you could later remove the unit for use in a different vehicle. You can also add options you may not have now.