Follow below link to manage your code with TFS repository http://tfs.visualstudio.com/en-us/learn/connect-vs/
Step by Step Guide for TFS Visual Studio . Com
How To: Delete a Team Project from your Team Foundation Service collection
To delete a team project from your Team Foundation Service collection you will need Visual Studio 2012 (or just Team Explorer 2012, which is free here). These provide you with the “tfsdeleteproject.exe” command line tool, which is usually located in C:\Program Files (x86)\Microsoft Visual Studio 11.0\Common7\IDE. Open a Command Prompt in that folder and then …