If you still decide to replace the parquet completely, then you should do the work so. 1) first you need to remove the skirting boards that press the parquet near the wall. Do it carefully so as not to spoil the wall covering. But if you have a ransch wallpaper, then you can not worry. 2) Find fragments of parquet, which are a little staggering and begin to extract them. After that, get the neighboring. Better to start from the wall. 3) after removing all the details, align the floor and you can put a new parquet.
We wish you good luck in the repair!