Yes.
It's part of your account and game login so if you have any problems or have to contact support that e-mail is what you need.
If I remember right after you click on the comfirmation link in the first e-mail it will send the activation link in the next e-mail, they need to make sure the e-mail is good and you typed it in right to make sure you get the activation link.
It is your account that is made premium. You could log into your account from any PC that has the Minecraft client.
Minecraft is bought through paying for a premium account on the Minecraft website.
i think in the minecraft pc version
The same way you do on a home PC.
No, because your account is registered online, you can use any PC to access your account.
Yes it's a completely different system and your Minecraft on Xbox will be connected with your XBL account.
You can buy minecraft at minecraft.net. First you need to make an account, then you need to buy a premium for that account. Then download minecraft, and login. Now you're ready to play.
Buying Minecraft for the PC costs $26.95 as of September 20th, 2014. It is a one-time payment, and as long as you remember your account information, you will never need to buy another account.
Same as you would on a PC. Download Minecraft from minecraft.net Then run the game with a paid account.
you can't delete it and why would you want to if you have the game
No, you get the download from the website when you make your premium account.
No, you download the client from the Minecraft website. The account you register there is more important than the client data.