See this great link...It worked for me on my 1997 which should have the same setup as yours (see related links).
You take it to a Toyota garage to have the work done by Toyota trained mechanics.
3.7 quarts to replace for Toyota sienna.
How do you replace a defrost blower motor in a 2003 Toyota Corolla
how do you replace a antenna motor for a 2000 Toyota landcruiser
Sell it
To replace the rear bulb in a Toyota 4Runner remove the plastic covers located in the trunk. Taking off the plastic covers will reveal the taillight housing and bulbs. Replace the bulbs.
I believe, you need to replace the thermostat gasket.
4 to 6 hundred dollars
how do I replace the seal on a 1990 Toyota 4x4 pick up, where the transfer case meets the exterior housing of the manual transmission?
To replace the thermostat in a 2000 Toyota Avalon, first, ensure the engine is cool and disconnect the negative battery cable. Drain the coolant, then remove the upper radiator hose connected to the thermostat housing. Unbolt the thermostat housing, replace the old thermostat with the new one, and reassemble by tightening the housing and reconnecting the hose. Finally, refill the coolant, start the engine, and check for leaks.
The lamp in the top brake light of a Toyota Highlander can be replaced by the locating the light housing from the trunk. Find the light cover and remove it to access the lights. Replace the bulbs.
remove the bolts holding the housing connected to the top radiator hose. go from there