yes
In the gas tank. I have 2001 Echo.
Of course. Heck you could convert it to a diesel if you really wanted to.
2001 Toyota Echo doesn't have a timing belt.
search for echo manual torrent
http://www.carspace.com/guides/Toyota-Echo-How-to-change-oil
3.5 Liters
It comes in both manual and automatic models if that is what you are asking?
manual recommends Dot 3.
see link
timing chain.
32 PSI