Adding normals & specular to objects without the texture set

Hey!

So I have an object that requires normal bump map and specular/roughness. But the different objects I try to make this one out of only seem to have a "Texture" map for base colors. I cant find this anywhere, seems like it might be a complicated thing. But, is there a way to add texture maps (Normal and specular) to the "Texture" Window within the texture tab somehow?

Incase needed, right now im trying to make it out of a mini robot toy template.

Thanks for any help!