So In Pretty Little Liars Who Was A?

Wait i don't get it what did Noah do to Hana cuz she says she thinks Noah was A but he isn't and so like who stole the money??and what happened to Jenna how did she become blind?? and who ran Hanna over?? oh and who payed that old lady to say that the people who purchased those 2 bracelets was Spencer Hastings? oh and does that guy that did Emily's phone have anything to do with like a or the disappearance?and what does Ian have anything to do with her death?? oh AND does that girl that hates Emily the 1 who gave everyone the bracelet that says go sharks have anything to do with it??? please tell meeeeee! and give me the sources please oh and tell me some spoilers from the book and stuff and like what happens at the end and is this the last season or will there be another 1? ohhhhhhh AND who is the girl Laura that looks like Ali does she change her name at the end?Thanks for the answers it really helps a lot!!!!!!!