To remove the drum brake from a 2001 Toyota Echo, first, ensure the vehicle is securely lifted and supported on jack stands. Remove the wheel, then locate and remove the drum brake's retaining screws, if present. Gently pull the drum off the wheel hub; if it's stuck, tap it lightly with a hammer to loosen it. Finally, disconnect any springs or hardware that may be attached to the drum before fully removing it.
see link
Look in the trunk, there is cover for the brake light, remove and you will have access to change the bulb.
yes
In the gas tank. I have 2001 Echo.
Remove the immobilizer unit?
To change the axle shaft in a 2001 Toyota Echo, first, safely lift the vehicle and remove the wheel. Then, detach the brake components and the lower control arm to access the axle. Use a socket to remove the axle nut, and then pull the axle out of the hub and transmission. Finally, install the new axle by reversing the steps, ensuring all components are securely reattached.
2001 Toyota Echo doesn't have a timing belt.
http://pdftown.com/2000-2002-Toyota-Echo-Service-Manual.html
http://www.carspace.com/guides/Toyota-Echo-How-to-change-oil
Yes
manual recommends Dot 3.
no idea it is probably using the brake fluid