kill

Is it possible to make a kill counter? I want to track kills because I want to make a team deathmatch gamemode. Can anyone help me?

So, I need to allow player to use only training rocket launcher. At first I tried to work with "trigger_multiple and command entity kill TF_Weapon_RocketLauncher", to delete default rocket launcher and force player to use training. But it deletes both weapons, and I couldn`t find a way how to...