Welcome to the forum Ceramicolive
Clutch pedal: if you can lift it up with your foot to normal position but it sags again when idling say at traffic lights, think master cylinder.
If it's very low all the time check clutch fluid level, failing that when it sinks to the floor terminally think slave cylinder, under battery tray.
Low running temp will likely be thermostat failed in the open position, common fault. Sensible to change the temp sensor (?green top) at the same time.
Happy cooping!