un, une, la, le and l'

please i need clarifications about1. "UN" and "UNE" 2. "LA", "LE" and L'

please respond in English 

Today in Nigeria 11:04:2015 Today in Nigeria is the gubernatorial election, two weeks ago was the presidential election which see the opposition party, APC triumph over the ruling party, PDP. Accreditation of voters is in progress while voting commences soon. It's people's decision today to choose who will govern them in the next 4 years. Wish Nigerians peaceful, free and fair election.

"about" VS "of" I see more similarities than differences in using the two preposition. For example "think about" or "think of" "dream about" or "dream of"

POST-ELECTION IN NIGERIA President Goodlluck accepted defeat and send a congratulations message, thus makes him some people's "hero" To those that voted against GEJ and now he has become your hero because of defeat acceptance and congratulations message. I wish you re-think or if i may ask why didn't you vote for him since he's an hero, that's one. Two, why won't he accept defeat? Why are the duo signing "peace deal". Oh! you guys have forgotten! it's even two times. Did you know the "gravity" of appending one's signature for such, so someone goes inline with agreement backed by legal terms, so he's a hero? Did you even know the meaning of hero? I plead you seek dictionary(ies) assistance, you will be convinced that he's no worthy to call a "He" not to say "Hero". The most wicked president to have ruled my country. I only commend his last action BUT he's not any hero.