if you're hu is in the jockey box, this would be cake. if it's in the dash, you will need to run rca's to the amp location.
most put it in the pass. storage cubby. assuming your battery is there as well, that will be a pretty simple install.

need to answer kg's questions above and you will get very detailed answers..

the kenwood sub would be a good choice for an entry level sub and should sound good in the right box. under the drivers dash in the front of the footwell is typically the location of choice...