Well, your first question; "do we really know who he is?"
I would say to that, how well do we ever really know another person?
A man's mind(or woman's) may as well be in another universe as far as knowing what someone "really" thinks.
As for your second question involving misinformation, non-coverage of issues and only two candidates...
For one I'd say media left objectivity about thirty years ago. If it isn't sensational it isn't worth it to them. And I personally am sorely
disappointed that the moment i could vote our political system had somehow become a two party system instead of four or five, with the occasional
rastafarian. We don't really get the benefit of competition in our politics these days like we do with most businesses. And lets be honest, a nation
is in many ways a business. I'd say it's basically become like two supercompanies controlling a given market, while it's not illegal it certainly
doesn't give you much choice or competition.
For now i think the best thing to do is discover which candidate best fits your views on the way the nation should be led, vote for him and then vote
for senators and congressmen who are more concerned about your state than their potential presidential candidacy or how much money they can make and
hopefully everything should balance out. But maybe that's my naivete speaking.