Yes that's true. As the first president he set precedents for future presidents, for example the title "Mr. President," having dinner parties, having a maximum of two terms.
B. I looked it up so I’m sorry if It is incorrect
As long as he or she is registered, he or she can vote.
Africa's resources were depleted and given to the American Colonies, which hurts their economy up to this day. Also, South America's natural resources were depleted (ie: Aztec gold) which hurt their economy as well. There's probably many more effects but heres one