yes
Yes.
There is a web version which is what I prefer.
yes, they are all free for download.
skindex
Yes, Skindex for Minecraft is free.
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.
you go to the sign in button then press it then type in your username and password
U dont buy skin...lol. U make a skin by going into skindex type a word in search bar click skin you want press download to minecrfat if logged on already. SkaBosh!
70% safe to download......
yes they are free