your car wont run without a timing belt dude, might run/idel rough with a really worn belt. But its either on or off. Check your belt for gashes/splits and replace if need be.
if you water pump if fuged, your motor is going to run real hot! as water isnt circulating through your radiator & motor. If you cook your motor, your also fuged. Depending how bad you cook it, you could be up for a new motor. (as the motor+ head expandes under pressure, and never returns to orginal state. Leaving your head/motor warped in some areas. This will mean that water is going to get into your oil, diffrent compression readings accross all 6 cylinders. etc.)