Have the floors refinished before you move in. Unprotected pine is very easily damaged. Protect your investment properly.

Looks like Pine to me.

I've heard great things about this: https://www.amazon.com/Rejuvenate-Professional-Restorer-Non-Toxic-Application/dp/B00KS70ARS/ref=asc_df_B00KS70ARS/?tag=hyprod-20&linkCode=df0&hvadid=167129842963&hvpos=1o1&hvnetw=g&hvrand=14078147202779443142&hvpone=&hvptwo=&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=9052158&hvtargid=pla-368542508807&psc=1

There is no quick fix. You need to get that refinished quickly.

Need to be refinished and best to do that before you move in. Otherwise, invest in some inexpensive runners to buy you some time.

Looks nothing like pine to me...pine is seldom used for floors in the past 60 or 70 years.
The floors are intended to have those variations in color, it's not something to fix but something to enjoy.

Post these pictures in the decorating forum and someone will probably know the name of the finish....think it was intended to imitate chestnut....or if your house is old....perhaps it IS chestnut!!

You have areas of wear-through. The stain is UNDERNEATH the finish. If the STAIN has been worn away then the FINISH has been worn away as well. That is a big concern. The finish is what protects the wood. Without protection, the wood will become damaged beyond repair. And that means your "gold mine" will be robbed of its value.

It is *possible (I doubt it...just by the look of the wear) that you could get a buff and coat done to give you another 5-7 years of 'life' for the FINISH...but the buff and coat will NOT fix the stain. A buff and coat ONLY works if the finish is INTACT. If it has worn down to raw wood, there is no 'fix' other than a full sand and refinish.

A buff and coat = $3/sf. The average sand/refinish (the full meal deal) = $5/sf. If you want the stain fixed, then you would be throwing away $3/sf when in fact you want to fix the colour which would cost another $2/sf.

You will want to bring in an NWFA Certified Sanding/Refinishing professional (www.nwfa.org) to help assess what can be done and for how much.

One other thought...it is possible the former owner used a product such as a gel stain OVER TOP of the finish. Which is one of the only ways you can have colour ON TOP of the finish.

Please get down on hands and knees and have a look at the heavy wear underneath the counter top bar/overhang. If you can see/feel raw wood, then you definitely need a full sand refinish.

The only reason why I'm thinking of a gel stain (very low budget DIY concept!!!! Sigh) is the uneven look of the colour. The dark lines next to lighter spots. It brings to mind a surface application of colour.

Before you speed dial a hardwood flooring professional, go ahead and have a good hands and knees inspection...especially underneath the bar area. If this is a gel stain/surface application of colour, you *might get away with another few years of life...

But if in doubt, bring in a high-end professional (NWFA) to ensure you get the best possible skill level.