Brake pads are VERY easy to change (about the same as changing a tire). Nearly all the labor involved in that quote is for the wheel bearings.

If you're going to have the valve cover gaskets replaced, you should also have the valves checked/adjusted while its apart. Most of the labor involved in checking the valves is just getting to them. The valve check itself pretty quick.

Both those quotes are on the high side, but that is to be expected from a dealership...

'97 4Runner, '06 F350, '86 4Runner, '05 WR450
http://home.4x4wire.com/erik