Re: power windows
All of the parts stores have the window motors for our trucks. Cost about $25.00 to $30.00 each. The factory used rivets to hold them on but the kit that comes with the motor uses bolts. You may need to grind off the rivets (Some folks that know how to, just use a nail set and a large hammer, but don't unless you know how).
It is better if two folks do this the first time. One to hold the window from falling and the other to replace the motor.
Good luck.