i would point you in the direction of a 5speed w58 trans.
i dont know much about auto, and 5speeds are what most people like maby.
easy to diagnose and get working.
start by checking all fuses and fuse able links. then try your lights.
this online manual is pretty dam good.
http://www.cygnusx1.net/Supra/Librar...2/default.aspx
as for sunroof and wiper. could be the motors, could be stripped gears...