kk, so... i will link ya the tutorials that helped me a lot, an from which i learned how to texture
I reccommend ya to use Photoshop, it's quite easy and nice with it.
The skinning and iconmaking are very close to eachother, you see, you can learn skinning from iconmaking and visa-vers. Hope i helped ya man... good luck on it
second, i'll post ya the links, cuz i cant write more than 1000 characters