Sorry for the late reply.
Yes, the tutorials are online here:
There's also a video version for them.
The videos were recorded on CE2012. The GUI did not really change since 2012, so we decided to not record new vids for 2013.
Please find also more info on how CE works in the FAQ thread in my signature.
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You'll find that one can not 'create rules from models', but that CityEngine is a procedural modeling application, where you always start on a shape ( usually flat, but can also be a 3d mesh ), to which a rule is assigned to get the model. Check especially tutorial vids 1,2,6.
Ok as a start ?