you dont need to bleed your brakes when changing pads/rotors. the grease is there so you can lube the pads before you put them in so you wont encounter any squeeling.
as for the pads, just take out those 2 bolts that hold the caliper on the bracket and slide the caliper off of the pads. then just slide the pads out and grease the new ones at their contact points with the bracket(also on the shims if you have them) and put them on. its not the hardest thing to do.
id probebly rate this on a scale from 1 to 10 about a 3 because it isnt difficult at all..