Hi,
Great that you've got a medium format camera, I really want to get into it as well. I can't help you with the camera but as to purchasing film and processing I can.
There are several good places for getting film, try:
7dayshop
http://www.7dayshop.com/catalog/default.php?cPath=777
They do a wide range of colour negative/transparency film as well a B&W (but not Ilford film any more sadly). If you order from them make sure the item is in stock first or it can be months before you get it if its on backorder.
AG Photographic
http://www.ag-photographic.co.uk/
Stock about every type of film there is and have great customer service especially if you have any questions over the use film types, developing etc.
Silverprint
http://www.silverprint.co.uk/
Likewise stock about every film known.
For processing there are likewise several good places that I use regularly (not for 120 thought the same should apply):
The Darkroom
http://www.the-darkroom.co.uk/
Excellent processing quality and turnaround time, they usually have my E-6 films back with me within 3 days of me sending them. Do all types of film.
Peak Imaging
http://www.peak-imaging.co.uk/
Same level of quality and service as above although their prices are a bit higher. Also do all types of film.
Club35
http://www.club35.co.uk/
Once again excellent quality and service, but to my knowledge they only process 120, B&W and E-6 once a week so it can take a while longer to get stuff back or so I've heard. I usually use them for my colour negative developing and printing. Do all types of film.
Ilford Lab
http://www.ilfordlab.com/
Only does B&W (although they will develop colour negative films the prints will be in B&W) and are almost unique in that they print on proper black and white paper and don't cheat like most places (including some of those above) by printing on colour paper, so you get wonderful B&W prints with deep blacks and bright whites with no chance of a possible slight tint.
Hope this helps you