Yes the 4th gens have the power rear tailgate window (hey it wouldn't be a 4runner without it!)
Inside there is a button for power up and down. They key fob can also LOWER the window but CANNOT raise it. You can also go to the back of the truck and put your key in the tailgate to RAISE and LOWER the tailgate window.
Well no one would blame you if you got rid of your 2000 and got yourself a 4th gen 4runner