Ilford still make B&W 120 roll film:
http://www.ilfordphot...Black+%26+White+Films
The Delta Professional range is the easiest to find (with online prices from £4).
There are still a few firms which process 120 roll films, but Ilford offer their own service:
http://www.ilfordphot...26+Professional+Films
For colour, you'd probably need to seek out Kodak's Professional Tri-X Pan 400 or their Professional Ektar 100 or Professional Portra 800 products.
If you're thinking of using the camera I'd advise getting the true shutter speeds checked first, as they can change greatly over time.
Chris