see link
See related link
yes
In the gas tank. I have 2001 Echo.
http://groups.msn.com/Sorensonbrian/fuelfilter.msnw follow this DIY
See related answers, its already been answered
2001 Toyota Echo doesn't have a timing belt.
http://pdftown.com/2000-2002-Toyota-Echo-Service-Manual.html
Look in the trunk, there is cover for the brake light, remove and you will have access to change the bulb.
You have to take out the engine to get to it.
5kg
3.5 Liters