I have done oil changes and maintenance myself. I just recently replaced a failed thermostat with the oem Toyota part (fun job) so that part is taken care of for you. But engine/transmission and the rest of the drivetrain is perfect. I only drive it more spiritedly when fully warmed up (when water temps have been constant for a while - wish I had an oil temp sensor). Also, I really almost never get on the second cam often. I don't know, I feel like it's abuse to do so...
Only known issues - Unfortunately, the air conditioning did recently stop blowing cold. I haven't had a chance to fully diagnose it (I checked the fuses and they look fine). ABS light intermittently turns on. Also haven't had a chance to fully diagnose, may be as simple as a connector/cable at the wheel sensors. Unsure.
It is my understanding that it is the stock radiator but from what I remember, the previous owner had something related to a recall taken care of. I can check the paperwork.
Soft top only.