It can be tempting to mock up these kinds of things and they can be done well with the appropriate software but I myself am a bit wary of this as sometimes it can be more expensive. When we first started doing business cards we printed them ourselves but we soon realised that it was a lot cheaper to buy them from the printer and considerably less hassle as they have economies of scale. These things can be assessed on a case by case basis. I would consider consulting with a few printers and see what they come up with and pick the best price and style for you.
Things you will need are:
Business cards
Headed Paper
Brochures
Things that may be useful
Compliment slips
Postcards with a picture of the place on it especially if it looks picturesque.
Depending on size wedding and meeting packs