UPDATE:

Roaches are gone. Smell seems to be gone, but I didn't feel like turning on the heat for the short time period I was there. I may just open the windows then crank the heat for a few hours before we put any furniture in the joint. The apartment still smells like dingy, stale ass though. I think I'll put one of those 99-cent pine tree air fresheners in the filter and see what happens. It has hardwood floors, so Febreeze would be pointless.

Next project...installing a dead bolt on the back door. Probably hire a locksmith to do the job since I have the upmost confidence in myself to screw up the installation. Can anyone recommend a locksmith who could install the deadbolt and match the lock to my front door key for not a whole lot of dinero?