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What do you mean by necessary? If you mean things actually required for aligning the wheels then what you need would depend on your current configuration and what kind of alignment you're looking for. For -0.5° camber in the rear you don't need anything unless you're lowered too much (since lowering will increase negative camber; not sure how much is too much), in which case you may want to get after market eccentric bolts (cheap) to replace the factory ones which will allow for greater adjustment, and if those aren't enough then you would need an adjustable control arm (not so cheap).
Toe adjustability is more than enough from the factory.
Regarding caster and steering axis inclination (SAI), JusticePete and others can tell you a lot more than I can, and in your case if you're just looking to reduce wheel hop then you don't necessarily need to consider these, but they may be of interest to you none the less. Basically, having a greater positive caster allows the wheels to centre easier/faster after turning, and a greater SAI helps keeps the front wheels pointing forward to improve stability. Caster is not adjustable from the factory, and so you actually need to create your own elongated hole by drilling out the hole for the radius rod bushing bolt, and SAI isn't adjustable unless you install camber plates (these can also adjust caster, or camber and caster at the same time).
JusticePete's website talks about this stuff and a few google searches will find you lots of info too if you're so inclined.
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