For the logo I would charge a flat hourly rate for the design of it. For the brochure I’d first have a meeting with the client, to get an idea of how complicated it is going to be. Then based on that ask for a start-up cost, and charge an hourly rate.
In the end I’d say a couple hundred for the logo… and the brochure could be anywhere from 400 - 800 (actually it could go WAY up, but I have no idea what they are looking for)… depending on how much stuff they supply you with and how much you have to creat on your own, and how much stuff they want in it.
The main thing is, if you are unsure what to charge try to leave it open ended. Give them an estimate, but be sure they understand that it is not final. That way if things require a bit more work then you had anticipated you didnt lock yourself into something. Hope this gets you started.