Flooring costs are all over the ballpark - you really need to look at a few different suppliers, decide what you want and determine if the cost differential really gives you something over less expensive products, or not.
To give you an idea, when we renovated this place I put in oak parquet in the bedrooms. I had wanted solid hardwood, but apparently that is no good for underfloor heating systems due to the risk of warping. So I went with a local flooring company, used the thickest top-layer parquet available, sandable some 4 (or was it 6?) times. Cost was something like CHF 280 (or was is 380?) per m2.
Older, wiser now - I was in Hornbach the other day and saw some very nice parquet for under CHF 80 per m2 -
exact same quality. Oh how I wish Hornbach had been around at the time we renovated...
Labor costs will also vary depending on what kind of flooring needs to be taken up.
As with all renovations, get at least 3 quotes. (Hornbach has lists of local contractors, by the way.)
ETA: We did the work before moving in - so the contractor had an easy time of it. If you need to move furniture or work around things, that may add to your costs. These issues should be discussed when you get a quote done.