You are not currently in the Material Room. To access the Material Room, click on the Material tab to the right of the Pose tab. To clarify, the eyedropper tool will only sample a color on a map and won't function as you intend it to. The mottled skin texture on the dragon is specific to its mesh and cannot be applied to other figures with different meshes. You'll need to paint the texture based on the intended figure's UV Map layout.