#3
**************.com has a sunroof repair and maintenance kit for about $30 that has a manual and instructions with pics and the right grease for re-lubing the sunroof cable. the grease gets old and thick, as it's from before these days of easily accessable synthetic greases.
they also have a manual on the 617 engine in your car, but you can get much more info here.
#1 get a new radio, pay best buy or someplace to put it in. as I recall grand prix is junk. that said, my 85 f250 still has the original radio. display doesn't work but at home it pulls in stations I've never heard of.
karl