Just a few questions

[passat se tdi]

Here goes, Firstly how can i get the radio code as i need to disconnect the battery to clean the drain plugs.

Where abouts is the starter motor as i think it needs replacing, battery has been tested and ok but car struggles to turn over but after a long run will turn over easily.

Is the clutch controlled by a cable as its bitting high and want to know if i can adjust it to help out for the time being. How long/much does it cost to change the clutch?

Thanks.