Shinta -
Since you are just starting this process, I would very strongly recommend that you spend a few days reading through the messages on the Family Class section of this site: http://www.canadavisa.com/canada-immigration-discussion-board/family-class-sponsorship-b5.0/
This part of the site will provide you with information about the different options available to you (e.g. applying outland vs. inland) and provide you with the opportunity to learn from the experiences of others. Many of the questions you have are likely already answered there. You'll also get a much better sense of how long the process takes, what information you'll have to put together, what your husband will/won't be able to do while waiting for approval, etc.
Hope this helps.