What is a console?
The console is a command-line interface for the advanced configuration of games.
By default console of each game is disabled. It's necessary to activate the console to join a specific match.
How to Enable on TF2?
1. Enter game [Options]
A small window will pop-up.
2. Click [Avanced] and tick [Enable developer console] option.
4. Press ~ (Tilde Symbol) on your keyboard. You can now connect the match by inputting the [Connect xx:xxxx:xxxx:xxxx] command.