Okay so here we go. Click on the links for visual help.
-developer = More advanced info goes to your console while you play -console = This just open the console when you start up the game +bind F12 toggleconsole = Well this make you get the console when you press F12 on your keyboard, I used F12 because some peoples have problem with the ~ appearntly.
Hope this helps you out people!
How bout just go to multiplayer advanced options and enable it there. It's not that hard.