So many questions. All relevant, all of them require much thought and deliberation.
What I will tell you and Cathy has already referenced it is that most of everything will work (Open Houses, Just Listed/Sold Cards, etc) as long as your are consistant.
A good broker/manager should be able to help you derive a business plan that will address many of the questions that you have.
So to answer what I feel is the general point of your question..."I am new, what is the best approach to stablish my busines?" Talk to different brokers in your area and discuss with them throughly what your financial, business, and life goals are. If you find a company who is compatible with your philosophies and has a plan to help you achieve goals then work with them.
Best of luck to you and if you ever need anything or require more advice feel free to visit me at http://www.hugotorres.com