Naval Jelly, then replate them (cadmium or zinc?). Zinc paint could be used but it would rub off in some areas leaving corrosion "hot spots".
If it was my car, I might wire wheel the worst, zinc prime the spots not involved with mechanical motion, check all the plastic and/or pot metal parts (if any) for wear and breakage, grease the sliding/moving areas real good and put it back in service.
As far as adjustment, if all else has remained the same, just put it back where the factory bolt marks are. If that does not work, you'll just need to loosen up the adjustments and play around a bit to see what effect they have on the window position.