Softminer.net

To install TFS 2013 you need to install SQL server 2012 or 2014
Look at the requirement here
http://msdn.microsoft.com/en-us/library/dn641202.aspx

After installation you have to create new TeamProject

and choose a process template for that, Here is the default process template
http://msdn.microsoft.com/en-us/library/ff731587.aspx

To be able to customize a template you should be able to download the template, edit it and upload it
http://msdn.microsoft.com/en-us/library/ms243782.aspx

Modify or add custom work Item
http://msdn.microsoft.com/en-us/library/hh409273.aspx