It looks like hardwood that needs sanding and refinishing. Sound right?
I agree, needs refinishing.
I would rent an oscillating sander from Home Depot, different grit sandpaper pads, A gallon of water based polyurethane. Totally refinish it
Thank you , this experience is turning me off renters.
It would look wonderful refinished! Looks like a older wood floor like my son had when he redid an old house. He had to make a few repairs and had to special order the wood to make repairs as this is a size that's hard to find now. Just an FYI if you need to make repairs. You can also remove some floor from a closet too if you only have a small amount to repair.
William is right. Rent an oscillating floor sander. Here's some tips that include a little video: https://home-tools.wonderhowto.com/how-to/refinish-wood-floors-with-oscillating-sander-253027
It looks like it needs to be refinished, not clean.
Hello, I would clean it up then follow instruction on the attached video