Can someone define these political terms without Political Bias?

[Mitchell]

I'd like to get an idea of what these political parties believe and their ideals, but where i can get a response that's not biased: If it makes it easier i understand capitalism well enough so you can use that to help describe these.
Democrats
Republicans
(I do know they have to do with more control for the left and less with the right)
Socialism (Is it really bad?)
Communism - So many people put it on the same terms with socialism but i get the feeling its a lot worse? or is it ideally good, just doesn't work?
Dictatorship - is it only used in communist countries and when does it turn from absolute monarchy to dictatorship? or are they also the same?
Marxism
Lobbyists (who are they)
Libertarianism
Totalitarianism
Authoritarianism (Is it the same as totalitarianism?)
Leninist

Lastly, I know this isn't a political party but what exactly is the deficit? I have heard that its the debt, but i have also heard that is the amount the debt raises in a year. Did Obama increase or decrease this, I have also heard both. Sorry but it's just hard to find fact from fiction when the two parties in the US are both constantly stretching truths and sometimes just flat out lying about one another.