Hello, I hope the following is of assistance.
If the clutch is stiff to press this is usually due to the clutch cover fingers and springs becoming difficult to move, this is normally just due to age. To replace the clutch is a large job, the manufacturers specified labour time is 8.6 hours, this involves removing the engine and transmission together then separating the transmission from the engine. With regard to the clutch take up point this won't be adjustable as the release mechanism is hydraulic.
I hope this helps but if I can assist further let me know and I'll reply as soon as I'm able to.