Will be closing on my first home next month and these floors are in terrible shape. The house is 100 years old this year and lord knows how many times it’s been refinished already. I don’t know how thick it is or even what type of wood it is but I need to make a decision soon.

Give me some input?

https://ibb.co/hcttnG4
https://ibb.co/GTg7Yd1

The pictures are not showing, sorry.

**picture links**

https://ibb.co/xJzB0W4
https://ibb.co/sW9pMsX

Your floor looks like it has a tongue and groove profile on the edges of each board. If there is any gap between rows of boards you can insert a razor blade or utility knife between the boards to see if you can measure the distance between the top of the groove and the surface of the flooring. If there is an eighth inch or more you ought to be able to sand to bare wood without finding nails that show on the surface that are holding the flooring down. If some nails show up as shiners, you can set them below the surface again and fill the "hole" with wood patch to match the specie of flooring that you have. Then with bare wood you will be able to choose the color of the floor. I recommend a light brown color, not "natural" so wear in the future will be easier to blend in when another coat of finish is applied over worn areas.
The floor looks pretty clean. There is an option of only re-coating the floor with at least 2 coats of finish after thorough cleaning using a system made for a no sanding finish.
I have re-coated worn floors and kept the coating that was there from wearing through, again. The floor will look better, but not like new. It will be easy to clean. It will not disturb the household as much, too. To see how this will look, you just use a sponge to dampen the floor. Wetting it will not hurt it because the water will dry quickly. While it is wet you will see the color that you will get after a coat of finish. Two coats will help get a smooth floor. Three coats in worn areas will be a better investment of your work.

Page does not exist could you please provide the fresh linkf of the same.