You definitely have some kind of custom mod or something that is overwriting your players. When your players look like that, it means the game can't find the textures. I don't know if you're using some kind of custom skin mod (I am assuming you are)...
Here are the steps for troubleshooting.
1. go into pak0.pk3 and open up the following path "models\players". open up with of the tik files in notepad or a text editor. Since you use allied manon from your picture, you can open up that file.
2. Scroll down and you will see something like script shader nameOfshader <--- this points to a shader (you will need to find this shader)
3. in pak0.pk3 if you look in the scripts folder, you will see a bunch of shaders. The tough part is finding the shader that has the function name that was specified in the tik file.
For example if it is
script shader nameOfshader
then in the shader, you will see something like this
nameOfshader
{
a bunch of parms
blah
blah
blah
blah
}
Easiest way to help you is tell us if you're using any skin\player mods.