Our ReVolt Pub

which editor do i need to make world and of course track for revolt?
any tutorials?
Is there any multiplayer patch for adding cpu cars in multi-player mode?

Hi and welcome to Our Revolt Pub

Sorry but no, there is no patch or utility that allows for AI cars whilst in Multiplayer mode.

As for track/world creation, I would suggest that you start with the inbuilt Track Editor, then develop your skills from there.
Here are a few links that should help you get started.

RV Extreme
The Re-Volt Workbench
RV-Glue Documentation
Tutorials Menu @ RVA

For made custom worlds and objects, you need to use 3DSMAX or ZModeler. Search tutorials (here you can find some)