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In the gas tank. I have 2001 Echo.
2001 Toyota Echo doesn't have a timing belt.
http://www.carspace.com/guides/Toyota-Echo-How-to-change-oil
http://pdftown.com/2000-2002-Toyota-Echo-Service-Manual.html
When the fule light comes on, you have about 2 gallons of gas left (about 60 miles). I ran out of gas one time, and now my light comes on when I have one gallon left, so I have to refuel right away. Also, you can find a manuel from any Toyota Dealer.
3.5 Liters
Depends on the driver. It can get up to 40MPG highway, 32 or higher city. I average 35 to 38 on mine.
timing chain.
see link
32 PSI
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