I know these may look foreign to some of the younger bots. These are figures created by NECA to resemble the original Ninja Turtles. You can order them here.
The series is sold as just that, one box, four figures. Each figure sports a couple dozen points of articulation. Making it that much easier to recreate your favorite TMNT comic covers.
And yes, they all had red bandannas in the comic series. If you can’t tell them apart without the blue, purple and orange… you’re a tool. Not the sexy automated robotic tool. But one humans use, like a hammer.