To get started with Android/CyanogenMod/ParanoidAndroid, you'll need to get familiar with Git and Repo.

To initialize your local repository using the ParanoidAndroid trees, use a command like this:

repo init -u git://github.com/ParanoidAndroid-Xperia/android.git -b jellybean

Then to sync up:

repo sync

   or

repo sync -j#       

For information on how to build, check Here