While I haven't looked too hard at the materials (still unpacking boxes and finding all my shite after almost 3 weeks), I'd say that it's drywall and wood studs above ground and cinder block below ground. Ceilings are assumed to be drywall as well and I have wood panelling in the family room.
Most areas are accessible from the basement or the attic (single floor rancher), but finding the right spots so as to not be to be near house wiring or the hot water radiators could be a challenge. Most rooms have at least 4 electrical outlets in them and I'll have to manuver around the baseboard radiators that take up at least one entire wall in each room. The family room has 2 radiators, so I've only got 2 walls left to work with.
I'm not expecting major problems. I just have to plan carefully as to placement of the wall plates.