I assume you are talking about your shape and skin. You cannot remove these, you can only change them. So if you don't like the shape you are wearing now, you'll have to find a new shape to replace it with. the same with your skin. There are places where you can find free shapes and skins, just search for "free shape" or you can buy them from different shops in SL, just search for male shapes. Most places that sell shapes also sell skins. Some shapes are modifiable, which means you can play with the size of your shape such as your height, eye size, waist size, etc, but most shapes are not modifiable. Some shops will have demos that you can get for free of for 1L so you can try before you buy. The demos are usually marked with abnormally large hands or a sign above your head that says "demo" If you go to your "search all" tab in your search box, there will most likely be some ads for shape/skin shops. And others are easily found through search. Make sure you have PG, Mature, and Adult search parameters ticked off before running a search. good luck.