Yes. Edward showed a huge dislike to Jacob Black showing that he himself knew that Jacob was in fact a werewolf or at least going to turn into one so I suspect that Jacob knew about Bella's secret but didn't want to interfere because he believed he could change that.
Yes, in the movie "Twilight," Bella eventually finds out that the Cullens are vampires during the first half of the film. She discovers their secret after witnessing their supernatural abilities and behavior.
She figured it out after she searched the cold ones on the web
No, but his dad does know
No, Jacob does not know she knows the cullens secret...truth be told, he doesn't know it himself, all he knows is that the legends are not true when they are.
Didn't you see the movie? For God's sake!
Jacob Black
Bella, Edward(the cullens too) and James in twilight. in all the others are different but Edward and Bella and the cullens stay the same.
Some of the Cullens (especially Rosalie) were angry when Edward saved Bella from being killed by the truck in Twilight because he could have given their secret (that they are vampires) away, as he used his vampire strength and speed to save her, but he did it in public.
chapter 9 theory page 179 i knew that without even looking at the book
Bella meets the Cullens formally.
The cullens didn't like Bella knowing because they thought she would tell everyone and they would have to move.
Bella first meets the cullens in the first book twilight. she was at a new school eating lunch with her new friends then she notices them and her friends tell her who they were