MockData Databases
Here are the backup files for the MockData databases. Download the version you require, unzip it and simply restore it with the following code (making sure you put your own data and log locations in):
RESTORE DATABASE MockData FROM DISK = 'C:\Program Files\Microsoft SQL Server\MSSQL12.MSSQLSERVER\MSSQL\Backup\MockData2014.bak' WITH MOVE 'MockData' to 'DataFileLocation\MockData.mdf', MOVE 'MockData_log' to 'LogFileLocation\MockData_log.ldf', FILE = 1, REPLACE GO
If you want to install the database yourself, you can download the files from here