The basilisk has yellow eyes in the movies, and probably in book-canon as well.
Yes.
Are they explicitly stated to be red in MOR?
The basilisk hasn’t been mentioned by name in MOR, aside from Moody suggesting it as a poison. Slytherin’s Monster was mentioned as possibly-not-real in Chapter 49, but without physical description. So no, there’s no reason to think it has red eyes.
Yes.
The basilisk hasn’t been mentioned by name in MOR, aside from Moody suggesting it as a poison. Slytherin’s Monster was mentioned as possibly-not-real in Chapter 49, but without physical description. So no, there’s no reason to think it has red eyes.