Clutch Master or Slave?
 

Here's my problem: When I press the clutch pedal to the floor there's little resistance and the clutch will not disengage. I checked the fluid level it was a little low so I filled it up and the problem is no better. I see no fluid leaking anywhere. When I press the pedal the slave cylinder does move but not very much. So the question is: What's broke Is it the master cylinder or the slave cylinder? or worse?

you have air in the system bleed the system. Did you pull back the boots on the master and slave to check for fluid in them? If you have air in the system it got there some how. Check under the dash where the pedal hits the master and check for fluid leaking.

Def air in the system. But it can only get there if ther'es a hole in the system somewhere. Could be either slave or master. Bleed the system and see if it happens again.