1 - There is no such thing as white and black magick. Magick follows the intent of the practitioner.
2 - No, powers cannot be transferred to anyone, living or deceased.
3 - Not all spells require moon phases and other accoutrements.
4 - No, nobody can be brought back from the dead. And why the eff would you want to bring someone back? They're dead. They're in the Summerland, a better place than here.