As long as the mounts are there, its easy. Take the bike with you into the LBS and ask them what rack for that bike. Get all the bolts for it, and then its just a case of bolting it on into the mounts. f there are no mounts, you will need P clips to attach it to the top of the frame. Its all easy to fit really.
To raise your bars, you need to raise the stem. On the top of the stem there should be a round disc with an allen key bolt. Undo that and take the spacers off from ontop of the bars if there are any. Then undo the two allen key bolts that are at the side of the stem. Take the stem off the steerer tube, put the spacers on under the stem and put the stem back on. Line it up with the front wheel and tighten up the bolts on the side of the stem slightly. Put the disc back ontop of the stem and bolt it on tight-ish. Then do your bolts on the stem up tght-ish and your done. If there isnt any spacers ontop of the stem then i dont think it can be raised up anymore. The way you would do it then is to get an adjustable stem and fit that on instead.
Best thing to do, is to just sit there and look at the bike, look at how the stem works, how the stem is held on/in place. Undo what you think is securing it, then see if it moves up. If it doesnt, look for what else is holding it in place. The disc ontop will stop the stem coming off without it being taken off.
Same thing with the rack. ook for where you think the rack will be secured on. This about it and ask in the LBS if the bits you think secure the rack are infact the right things. If they arent, then ask what is.
Dont be worried to try something, but remember what you have undone/adjusted.