Will using mods/console on L4D2 get me VAC banned?

No, it won't

VAC banned is more for direct and indirect cheating, im pretty sure remodding your character skin is only local side, its not like it adds a move speed bonus or life bonus or auto aim thing to it.

VAC doesn't ban for mods/skins/console.

Nope, me and my friend even made a LP with reskins and nothing happens :-)

You can use scripts in that game as well. Just don't pay for some program that makes your guys go three times faster or telefrag.

I think your question has been answered, but I feel bad for you as I think FPSs ROCK.

VAC doesn't ban mods,skins or console. Aslong you don't use any third party programs... Console is integrated in-game. You can launch the console Ingame. If you put "sv_cheats 1" to your console (ingame) you can change your firstperson to thirdperson, spawn tanks, zombies and much more. As I said the console is a part of the game and not a third party program. YOu will NOT receive a VAC if you use the console.