Upgrading and Installing TFS 2005 to TFS 2013

Install SQL Server 2008 R2
Copy Databases to TFSServer and Attach to local SQL Server
Install TFS 2010
Install SharePoint 2010
Follow wizard to upgrade from TFS 2005 to TFS 2010
Uninstall TFS 2010 after database upgrade
Install SQL Server 2012 SQL
Attach TFS databases which were previously attached to the SQL Server 2008 R2
Install TFS 2013
Perform another upgrade using the TFS 2013 wizard