Change it every 75,000 miles.
You should change your automatic transmission fluid in Toyota gearbox at least after every 30,000 miles.
you should change oil on you car every 5000 miles
Each 5k miles.
50,000 mi
Every 8000 km,or 6 moths.
Every 15,000 miles.
What type of trans oil does and how many lts
If it is an automatic transmission every 30 thousand miles.
Change your air filter every 30,000 miles or sooner if you drive in dusty conditions.
You should change the belt when it is about to wear out, which a mechanic should be able to tell you when you need to, or you can also change it more often to make sure you wont need to.
Toyota sound systems have a internal antitheft code. You must have that code to use the system once it has been powered down/ disconnected. Often times it can be found written ion the back page of the owners manual....hopefully!
I think they recommend to change it each 160-180K miles.