Hurrah! Old-skool photog action!
When you get just the film processed, you'll get back the negatives (or slides). You can get a fair idea of what your pictures are like from these, because they're not too tiny. Scanning's a bit trickier. You can use a regular flatbad scanner, if you can find a film attachment, but my experience of these is that they give very low quality images. Dedicated film scanners give much better prints, but are pricey - especially for one that will take medium format film. Have a look on ebay, but you're talking about several hundreds of pounds, at least, I would reckon.
When you get the film processed there might be an option to have it scanned and placed on CD as well, and this might be worth trying out - my experience of this is very much that you get what you pay for, though, and decent scans are not that cheap.
You should also have the option of a contact sheet, for a couple of pounds more - that's a sheet with neg-sized copies of your photos, and often useful.
If you're mostly going to scan the prints, you're probably better off choosing slide rather than negative film, for colour, because IME it produces better results more easily.
Of course, you could always start to do the processing yourself - this is pretty straightforward for b&w, and old darkroom equipment pops up for *pennies* on ebay, if you have the space for it.