My throw out bearins went bad can i just replace them

Throw out bearing? Do you mean the clutch release bearing, aka throw-out bearing? There is only one in a clutch system, and, yes, they can be replaced, without replacing the cluytch disc or the pressure plate. But if it is making noise, it is good practice to do the whole clutch replacement while the transmission is removed. If your budget won't allow that, at least check the clutch friction plates for wear.