to get TDM you'll need to run your server from pyspades. to do that you will need to download the feature server from
http://code.google.com/p/pyspades/ and extract the file. after extracting the file, edit the config.txt file and change
"game_mode" : "ctf", to
"game_mode" : "tdm", . then start the run.exe or run.bat file and then go into your server and it should be tdm.
also TC stands for Territorial Control which is a game mode similar to domination on CoD