it kind of sounds like maybe they dont have a finish on them ,another thing it could be is maybe too much wax...furniture if you polish alot gets alot of build up,will turn white.To see if its wax you run your fingernail on the wood youll see wax.On the other you could use like a side of cabinet you dont see easily use a wax ,hand rub,see if white goes away.Or you could try some kind finish ,we used a sealer oil cant think of name that was nice.

Scuff marks can be removed by rubbing with a dryer sheet. First make sure the area is clean by wiping with a rag, then use the dryer sheet and lastly buff with a soft cloth.

The white film could befrom moisture under the sealer coat if the house was empty and unheated. If that is the case not much will bring it back.

I would suggest you look into minwax products and see if any of the hardwood restorers would work.

You could try oiling the cabinets with lemon or teak oil. I do my cabinets with them once a year to keep them from drying out. I put it on with a little excess and leave them for at least half an hour then buff off the excess with a soft cloth