u can change the wallpaper by urself. it's not very difficult.. the most trouble thing is to remove those old wallpaper. and the floor is easy to change also.. not too expensive(compare to ur house lol...)
and i love the kitchen and bathroom.. these 2 r very expensive here, but this house is quite nice with this part. so if i were u, i would like to take the 2nd hand one.. much nicer!