The Compass only has one option at this time: the 2.4L GEMA I4. It does come standard with front wheel drive, but with 4 wheel drive optional.
Based on the Mitsubishi GS platform, the Compass is closely related to the Jeep Patriot. The Dodge Caliber is also very similar to these vehicles, almost like a combination of the two Jeeps.
This vehicle is not Trail Rated, meaning that it cannot complete the the offroad trail setup at Jeep's testing facility. It is the first Jeep in many years to not have this rating. Jeep once proudly hailed that all of its vehicles were Trail Rated, but they had to give up that slogan in order to allow the more civilized Compass to come in and compete in a very popular market.
The Compass is expected to sell well in the U.S. market, with a combination of a low price tag and the Jeep name that is popular with young buyers.
These Compasses are not yet showing up on the used car market, and I wouldn't expect to see them there for a couple years. You might be able to pick up some dealer surplus stock on places like eBay, but even that is not likely for at least a few months.