Clutch Master Cylinder

90 Isuzu Pickup 190,000 still drives great. I was beginning to drive the vehcle, I stepped on the clutch pushed it to the floor and it didn't return until I pulled it back up manually. I checked the Master Cyl and it was empty.
Poured fluid in it but it didn't give me a clutch: I assume the MC needs to be replaced.
Does a Clutch MC need to be bled? And if so how do you do it?
As I poured fluid into the cylinder and pumped the clutch, the fluid all leaked out somewhere around the MC. The slave Cyl. Was replaced 2 years ago?