Here is what we Know about Carlisle:
He is the one that changed most of them (Esme, Emmett, Rosalie, and Edward)
He loves and is married to Esme
He was chaned by a bloodthirsty vampire in London that lived in the sewers
He if the "father" figure in their family/ coven
He first moved away from people when he realized what he had become but then found out that he doesnt have to be a monster and take away peoples lives.
He drives a black Mercedes
He is a doctor (which ends up to be very useful because Bella gets hurt quite often)
He works in the local hostpital
He has amazing self-control
He is a vampire