How to make cash system? I just need an explanation and meaby a bit of a script, i will do the rest myself.
... Um. Right.
Have an array of integers, let's call it, say,
money, add however much you see fit to
money[Killer] in OnPlayerKill. Make sure to properly reset it if a player would leave the game as well in OnLeaveGame. Implement some sort of /buy command using OnPlayerCommand, checking and decreasing the player's money as you see fit.
For further reference, you could check out either of the two Counter-Strike scripts around, which both have a money system implemented (s'if a single variable would be enough to call it a system though).