Can I get someones password if they dont use my computer?
Sure you can, ask them for it. If they give it to you then you'll have it. REALISTICALLY they won't give it to you, because that is their private information, and they don't want people pawing through it. Give it up. It's a lost cause unless you are a hacker. And if you are, you really need to get some hobbies.
Nope & stop stalking.