The number of DC Comics Lantern Corps varies depending on the storylines and continuities. But typically, you'll come across at least seven major ones like the Green, Red, Blue, Yellow, Orange, Indigo, and White Lantern Corps, each with its own unique characteristics and powers.
I don't think so. To the best of my knowledge, Red has no significant presence or role in DC Comics. DC has a vast array of characters, but Red isn't among them.