For the flooring you can pay anywhere from £20/m upwards depending on the style and brand.
I’d go with engineered personally, more stable and less chance of boards shrinking and causing gaps like a solid oak for instance.
Fitting, I don’t normally work out prices on a meterage rate as each job will have a different set of requirements. As in what shape are the rooms? What’s going to be done with the skirting? How many doorways are there to cut around? Do you want thresholds on the joins of rooms or can we get away with not using them (unlikely as you will need expansion gaps at generally max run of 8-10m depending on brand of floor used.)
For best results I always advise to remove the skirting, fit the floor then refit skirting on top. Gives a much better finish and no need to have that crappy beading around the edge.
I think some fitters would charge around £40/m to fit to give you a guide price
Where are you based, if local to Herts/ N London I can give you some places to get the floor from