So my hamster babies need a momma ?!?

i got a hamster yesterday and no one told me it was pregnant , so last night it popped out six babiess . when i came home from school there were only five and when i came back from the pet store only four and one of them is bluish so i think she's dead . the mommy was just too young and doesn't want anything to do with the babies , so i decided to be there mommy . i know you feed them kitten milk but what brand ? and what do i feed them out of and do i like hold them when i feed them ? and how do i keep them warm a heating lamp ?