Okai, recently my brother accidentaly spilled water on this computers keyboard, breaking the c key, so I can't hold all in Toribash. Is there a way for me to change the key for hold all?

P.S I copy pasted every "c" in this message..

Get a new keyboard.

And no, there is no way to change the key for hold all.

You could use the on screen keyboard. Start > Programs > Accessbility or Ease of Access > On-Screen Keyboard