Depending on which engine you have, the diesels have the slave cylinder on the top of the gearbox, Twinsparks are inside the box, which means you have to take the box off to change. Regarding the master cylinder, it's a common fault, and was the case with mine.
Bleeding is fairly easy, look at the top of the gearbox, you should be able to see the slave cylinder or inlet pipe for the cylinder, on mine you pressurise the system, via eezi bleed or by pumping the pedal, partially remove the hose clip and pull the hose out slowly until you get air/fluid coming out, a small clear pipe will help, as with brake bleeding.
Clutch fluid is shared with brakes, it's in the same reservoir so top up there.
Also inspect the cylinders for leaks, a faulty slave will show fluid on the gearbox or bottom of the bellhousing, master cylinder is harder to spot, but may show signs of fluid on the pushrod, which is visible from the driver's footwell