Thanks for the advertising, Habber.
But to play those servers listed in the group description, simply open up TF2C on the Beta Test Branch of Source Multiplayer SDK 2013. Then after that Open the server browser and go to favorites. After you do this you need to right click somewhere in the middle of the window, and you will get one option. Click 'Add Server By IP Address' and add the EXACT IP of the server you want to play. My group lists 3 of the Official Vault F4 servers. These are guaranteed safe servers, and the ones I use to host events for my group.
As for bots, no. There are Puppet bots within the game, but not ones that can be played with. These bots will only act on player given commands.