I'm linking to my craigslist post because I no longer own a 4runner and don't check my PMs/notifications here. Please contact via craigslist mail relay or the phone number from that post.
GX460 / 4runner / tacoma / GX470 wheels + tires - auto wheels &...
Your seat occupancy sensor was stuck. The truck is not supposed to allow you to use the remote buttons while the seat is occupied. Once it heated up enough, the truck didn't think anyone was in the seat, and allowed remote commands to work.