Thanks for all the information!
First the bad news: not a cottered crank... and not lugged frame.
Now, the photos.
So, I think it is a Murray or Huffy made bicycle, but I'm still happy with it. The bike was originally posted on CL for $70, so I'm glad I didn't pay that much. I did, however, drive out to Elgin (far suburbs, Amesja) to get it.
My plan of attack:
1. Replace brake pads and adjust brakes.
2. True the wheel
3. Replace the seat
4. Replace grease in the bearings
5. Add a rack to the back.
Thoughts? Am I missing a crucial step?