How does a member add a badge from my site to their web site?
As Ning offers that functionality on the front page, you have to click on there and on the bottom there is the code you need for this. Code means HTML, the "language" that websites are written in. People will find that if you activate the functionality. But given your tech affinity, I would not recommend to try to explain it to anybody - If they know it, they know what to do, otherwise there is no chance for you to teach them. Except you learn HTML programming...
How do I find out how many people are viewing my site each day?
Just this: Your keyword is "google analyzer". This again is a quite complicated task, but doable. I'm not aware of any other possibilities also they surely exist - but don't expect them to be more easy.
And another tip: if you want help from more people, post this in a new question though people get the idea of your question. Nobody will follow this old thread to find your new questions...