too many textures

Unity Engine
1

my model have 4 separated textures but i just can insert 1 on my unity, how did can i insert and use all the 4 textures on unity ? here is the model Crab (Crash The Wrath of Cortex) Model by CRASHARKI on DeviantArt

2

SOMEBODY HELP ME here is the model Crab (Crash The Wrath of Cortex) Model by CRASHARKI on DeviantArt

3

SOMEONE HELP MEH!!!

4

Look up assigning multiple materials to a mesh.

5

yes