Animation and layers only 1 layer is showing up

Hello,

So i am new to the animation part of unity, I am making a 2d game, and I created a character using sprite sheets, which right now have the body working to talk down if joystick (its a mobile game), pressed down, the character body show is walking down... BUT, like the title stated, I have several layers:
body layer
shirt layer
pants layer
hair layer

again, the body shows up, but the other layers are not showing up... not sure if its a layer problem or maybe its the sprite renderer...

right now for the layers, I have all 4 set to:
Mask: None
Blending: Override
Sync: False
IK Pass: False

I am not sure if MAYBE I should just do it in per object for each of the parts (Body, Hair, Shirt, Pants) and have an animator for each... i thought using the Animation Layer would take care of that... but also, on my C# code, if its 1 = blue, if its 2 = red, 3 = purple etc., how would I pass that in to change the sprite colors?

screen shot attached