Welcome to the forum! It's a great place for information about the Libertys. You can find almost everything about them here.
Definitely do some research and reading for everything. But pretty much, you're stuck with stock flares unless you want to be creative and make your own(by all means go ahead and post what you do, make sure you include pics!!!). As for a leveling kit, we don't have a kit like most pickups do that will only lift the front. There is a spacer lift that says it levels it out and gives a 2" lift. However it is strongly advised not to go with any spacer lift kits due to the weak springs that the KKs have.
If you're looking to lift and level then diffinitely do a full suspension lift. Jeepinbyal has pretty much everything you could need. There's a few lifts out there including Old Man Emu(OME), Iron man, and Jeepinbyal's custom coil overs. The coilovers are adjustable and supposedly well worth it, but cost 2500-4k+(2.5" and 4" respectively). Other wise you can do the ironman or OME lifts for about 700-750ish. That, if the right springs are chosen, can net around 2-2.5" of lift. You can always add some extras to it and get 3-3.5" of lift. Most people choose to go the OME way. I chose the OME/Bilstein way and added the extra goodies for more height
Oh, last thought for leveling, you might be able to do a clevis lift to level it, if you need more you can add a 1/4" top plate for a little extra height. Not sure what you would need there exactly to level it, Tom will most likely see this and be of more advice. He's the lift guru.