Playing a friends copy of Minecraft [closed]
Solution 1:
Hover over "Games" and click Minecraft and instead of clicking "Get Minecraft" click "TRY IT FREE" it will allow you to download it without paying for it, just make sure you log in (with HIS Username and Password) after it installs and before you launch the game.
Solution 2:
Downloading Minecraft is free but you need to pay for the account. If you want to play you would need your friends Username and Password. I would also recommend changing the email associated with the account to your email so if you ever get locked out you can get back in.