It runs on SQL CE, but there is also a SQL Server .bak file which can be used.
Username: admin
Password: framework123!
This video explains all the new features of the Hybrid Framework for Umbraco v7 and how to use them: https://www.youtube.com/watch?v=Enni9r0whCE
There isn't any other documentation yet, but in the code there are a lot of comments which can help.