#2
There should be a small Allen key with the guitar. Use that to turn the posts on either side of the strings at the bridge, to raise or lower the saddles.
#3
See the saddles on the rear? The one behind the bridge pickup? Your guitar should have come with a small allen wrench...just put that in the corresponding saddle where the strings are too high and turn counter-clockwise to loosen. Do it evenly so you can press the string down without a problem.
#5
A minor adjustment. Not as bad as switching gauges or adjusting the truss rod. If you have some precision screwdrivers (about $3 at Sears) it's really no big deal.