Perhaps others have different experience, but from what I have personally seen and understand, something like raising capital is not really the kind of thing you just have a board of advisors member do for you. It's a big undertaking, and it's they'll help make an intro or two, but it's still mostly you doing all the work. Same goes for business development.
The board of advisors are meant to be a sounding board for your strategy, an experienced eye giving you feedback on the product, and also (I feel) a way to motivate you to keep making progress. With my advisors, we keep things light, but I call them or meet every few weeks, and when I do, I don't want to look like a chump who hasn't gotten anything done.
As for agreements for board of advisors members, I'd say you should check out this "open source" agreement from the Founders Institute that has all the main points. I used it and slightly modified it when bringing on two advisors for my company. Check it out here: http://fi.co/contents/fast#