sorry it should be an estimate of what you will earn per 1000 page impression. Which is quite high in your case
Depends upon how much traffic that is based upon. If you've got 16 impressions then these types of statistics are meaningless. If you've got decent traffic and this figure is repeatable over a period of time with this traffic, then more can be said.
"Is having a eCPM of $79.90 good? " That looks like a very good eCPM. But only if you are getting a good traffic and good CTR. I get much lesser eCPM.
With low impressions and clicks per day it will vary WILDLY. It will settle down once the traffic becomes significant. 203 impressions isn't enough to really tell anything.
Are you referring to video, ad unit, link unit, and search unit on the same page? If so, I would use them sparingly. Some people get turned off if they get to a site that seems to be nothing but advertisements. A lot will depend upon the lay out of your pages, sometimes placing an ad unit and a link unit is all that looks aesthetically pleasing, and in fact it may fit into the site very nicely. Go with what looks best on your site and which would not be considered obtrusive or off-putting to a visitor.