No they don't have a baby.
he imprints on her
Yes, in Breaking Dawn.
Bella has her baby during book Jacob in Breaking Dawn.
Renesmee in breaking dawn, she is Bella's baby girl
Yes. Jacob Black imprints on Bella's baby in Breaking Dawn.
edward is the father
Yes
Edward Jacob Cullins
She has the baby in the second 'book/part' of Breaking Dawn, which is written in Jacob's point of view.
Breaking Dawn will be all about how Bella and Edward marry, about their baby, and how Bella turns into a vampire, and the story about Jacob and Renesme.
Jacob does not marry Renesmee in Breaking Dawn, shes a baby... Will they get married? That's up to Stephani Meyer...
edward is hotter than jacob