Removing the rear wheel is reasonably simple, if you have something to lift the bike with.
Once the wheel is off, greasing the splines is not that difficult.
However, you do need to makes sure that you put the bevel box back on in the correct way. The correct procedure, as shown in the manual, is
VERY important. If you get you local bloke to do it then print off the pages of the manual for him.
Replacing the brake pads is a five minute job, including washing your hands and disposing of the old pads. (I assume that you wash your hands before working on the bike.

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