Not exactly. He stays with the Death Eaters, but in the end he appears to side against them.
But he doesn't technically leave them.
Death Eaters, he was one himself but it is unconfirmed if he had the dark mark.
To get the death eaters into Hogwarts.
Yes.
Yes, in book 6.
It depends what you mean by group. He was in Slytherin house and he was a death eater.
Snape, Draco, and Billatrix
Death Eaters were the dark wizards and witches who were followers of Voldemort.Some of the better known Death Eaters were:Bellatrix LestrangeRegulas BlackAlecto and Amycus CarrowBarty Crouch Jr.Lucius and Draco MalfoySeverus SnapeYaxleyPeter PettigrewIgor KarkaroffFenrir GreybackAntonin Dolohov
Multiple e.g voldemort,bellatrix,draco,and more death eaters
Draco Malfoy, Amycus Carrow, Alecto Carrow, Fenrir Greyback, Severus Snape, and Yaxley
Lots of people hate Hermione Granger, including Lord Voldemort, the death eaters, Draco Malfoy and Pansy Parkinson.
Because they hate each other (as in Draco and Harry) or that person is their accomplice (as in in the Death Eaters) or maybe they're just British.
Draco's dad is Lucius Malfoy and his mum is Narcissus Malfoy.