As long as the unibody isn't tweaked you're just looking at the obvious; new bumper, new hatch, new taillights, maybe even your exhaust depending how far down the damage extends. That's all (relatively) easily replaced but the cost will add up quickly. It being a 6-year-old base model, you may try working out a deal for an estimate from the body shop if you don't want it to be totaled. As others have said it won't take much to get you to 80% of the car's value.
I'd be looking closely at things like control arm attachment points to make sure you don't have more structural damage than you think. I don't like the sound of that stress crease in the rear quarter panel... that's not an area you can just bolt off and replace.
