Yeppers.
no you can not
Minecraft is all about the account you made, you can log into that account on any computer, you are not forced to play it only on the computer that you purchased it on.
Play the game
Yes, simply download it from the minecraft website.
you just have to download it on the computer you want that minecraft to be
obviously its amazing for ur computer if u play minecraft ur the best! :D
If you want to play Minecraft in your web browser, you will have to install Java on your computer. Java usually comes with browser plugins that can be used to run Java apps such as Minecraft in your browser. You can download Java from Java's website.
Yes, actually minecraft first came out on computer
Yes you can, but you need to download minecraft for macs
No
if it is a computer
Visit the Minecraft website, you can play the free demo version, or Minecraft classic from there.