I use a few different methods to remove wallpaper. All of your floors will be covered. The area I work in will be cleaner than when I arrived. I dispose of all trash, I remove all wallpaper and paste from the walls so it can be paint or wallpaper ready.
The picture on the bottom on the left side you are looking at the print and on the right, you are looking at the wallpaper backing, which also needs to be removed.