Best best for you clutch pedal is perhaps to disconnect the master cylinder from the system and first ensure the pedal pivots are OK, if they are I would look toward the clutch being at fault perhaps. Many heat cycles through a clutch pressure plate will lead to a very stiff clutch, if the vehicle has seen a lot of off road use or towing use this will cause a lot more wear on the clutch.
For your brakes, ensure that all the pistons are free and moving as said above, a strip and clean of all the calipers may be a good relatively low cost place to start.