Go to Crutchfield.com. You can buy detailed visual instructions for cheap. The instructions will walk you through the process of uninstalling the Nakamichi and re-installing a new stereo. Should save you some dough if you don't mind doing the work yourself.
Rob
Follow this link. It will totally hook you up on how to deal with resetting your remote. The ECU is under the driver's seat. Hope this helps.
Rob B)
http://www.4runners.org/images/rs3000/4RAlarm%20Manual.pdf
I have a 96 LX 450. I went to replace the front brake rotors and couldn't figure how to remove them. I removed the caliper, but was unable to figure ot how to get them over the end of the axle. Any help would be appreciated. Thanks, Rob.