Considering the age of the parquet floors, you can definitely consider refurnishing your floors before moving in, it would be less of a hassle now then to do so after you've moved in your furniture. You can, 1) Place a rubber protection on legs of furnitures, beds etc. 2) Avoid using excessive amounts of water when cleaning the floors ie mopping. The cost of the refurnishing pretty much depends on the area of the rooms, and the choice of varnish being chemical, water-based polyurethane and the seldom used oil.