mesh object is all brown when i put texture map on it

[ricky Wirefly]

hi i git a free mesh dog and it came with 3 textures one is the body head fur cover second is blue bumpness  i guess 3rd is same as furst but darker is there something i need to do to all 3 before i upload them and  do i just drop on mesh like regular prim please help im very new to mesh

[Rolig Loon]

https://community.secondlife.com/t5/English-Knowledge-Base/Materials-Normal-and-Specular-Mapping/ta-p/2034625