Disc brakes in the front, drum brakes in the rear. Anti-lock brakes were optional.
http://groups.msn.com/Sorensonbrian/frontbrakepads2002.msnw
To adjust rear brakes on a 2002 Toyota Echo, remove the drum, turn the star wheel adjuster until slight drag is felt, then reinstall and test brake pedal feel.
search for echo manual torrent
Disc in front, drums in back.
There are none.
http://pdftown.com/2000-2002-Toyota-Echo-Service-Manual.html
See related link.
The 2002 Toyota Echo OBD 2 port is under driver side dash next to kick panel
For my 2002 Echo it is 3.7 Liters with a filter change.
3.6 liters
To flush the coolant in a 2002 Toyota Echo you will need to drain it first. Flush with fresh water and then refill with coolant and distilled water.
Not unless you have run out of gas.