I have clients that I bill per hour, or I might have a job that I quote a set price to complete. I would have a set price. You will have to determine what your time is worth per hour, also what I call set up charges. You will be using your computer, electric, ink, and the cost of the labels and disk that you will give your client. All this will factor into your quote.
Brochures are a little different.
I needed a competitive edge. I don't do the actual printing, just the copy. But I do have paper samples which I print copy on to help the client choose a good stock. Kinko's is a place that reproduces a lot of stock well, except business cards, which I suggest a printer or a place that sends them to a printer. A professional printer should do all high gloss papers and photos.