Need More Information on Communities Plug In

We have installed the Communities plug in. However, all we have on our dashboard is the following: Communities - Manage Communities - Add Community - Find Communities. I note the following slide when viewing the slide presentation on the Communities Plug In page. It shows "friends", "forums", "inbox", etc. Are these separate plugins we have to add or are they part of the Communities plug in package?

2nd question: How do we make an owner an "admin"?

Thanks for your prompt response,

Linda S. Fitzgerald