it sounds like you might have a problem with the transmissions' shifter linkage. if it is not properly adjusted it may feel as if the transmission shifts into a different gear but it actually just stays in the same one.
No and I could be wrong on this but if it is a true automatic transmission and not the DSG, you have to disconnect the drive wheels from the transmission like with every other car sold with a automatic.
check the automatic transmission fluid
You should change your automatic transmission fluid in Toyota gearbox at least after every 30,000 miles.
If it is an automatic transmission every 30 thousand miles.
Every car sold in the US has an option of buying an automatic or a manual transmission.
No... You can stop by most transmission shops and have them changed.
Every 30,000 miles
Automatic transmission fluid should be changed according to the manufacturer's suggestions. Many manufacturers suggest having the fluid changed at every 100,000 miles.
EVERY 50,000 KMS.
every 50,000 miles if it is an automatic trans.
if it is a automatic transmission you should change it every 15,000 miles, and if its a manual its recomeded at 30,000-45,000
You should use it every 40,000 miles to keep your transmission well lubricated.