Yes it is
Yes.
You can find it at the minecraft skindex
There is a web version which is what I prefer.
yes
you go to the sign in button then press it then type in your username and password
If you mean as a skin then you have to go to a Minecraft skin website, I normally go on Skindex, you can search for Skindex on Google and once on the site you can search for whatever you want
yes they are free
you can go to the skindex to change ure skin skindex.com
yes, they are all free for download.
Yes.
skindex
They should cost nothing, you can make your own or download one off ofsuch sites as the skindex
Google a Minecraft skin website, like the skindex, and then you can browse the different skins in it, and download one that pleases you. Then, you go on minecraft.net and go to your profile, and upload your skin.