Mocha, mocha...

Here is a Rotoscoping Tutorial that might help clarify what is in the manual. So you don't get frustrated I must mention (if you have not figured it out by now) that some of the options listed in the manual are not available on your version of Mocha (like the stabilize tab) but only on Mocha Pro.

An HERE you can find plenty of Mocha tutorials by different people tackling different problems that you might encounter.