Clutch?

I have a 1971 Toyota 1.9L 4speed manual and i've had some leak coming from the clutch at the firewall, and my fluid is empty (i'm assuming its a hydralic clutch) Well my question is can this problem be fixed or will I need to replace the master cylinder or buy the rebuild kit either way if you could give me any tips on repair'ing or installing I would appreciate it. Thanks again