Fear of Flooring

L has been interviewing drywallers for the interior of existing first floor. The rough-in plumbing and electrical have been completed, and he has installed extra batts of insulation at front (east) edge of Living Room. Due to the roof slope, there is no second floor in that area.

Before we get too far into the walls, though, we need to deal with the floors. There is an unbelievable mess of stuff on/in the floors. This is where the load-bearing wall used to be that separated the Living Room (cheap parquet tiles) from the bedroom (subfloor that was underneath carpet.

Hallway (old bedroom) to Kitchen (the most foul flooring in the universe. Who puts WHITE linoleum in a family home). I will be personally delighted to start ripping this crap out myself.

Boy, I don't even remember WHAT this is. Maybe the old stairwell wall next to new subfloor?

Oh, and here's the best one:

This is at top of stairs to Office & Garage. It used to be one-half of the main floor bathroom. The green houndstooth (?) floor covering was underneath the white (again with the white!) vinyl flooring in bathroom. The different types of flooring and changes in subfloor in this area make me suspect there might have been a leakage issue in the past.

There is also a small area where there is NO floor; you can see right through to basement. I think most of this was previously covered by a wall structure.

There will need to be a lot of grading/scraping, etc. before we have a basic, level floor that we can START putting new flooring on.