Searching for torrents of copyrighted content is not a good idea. It violates the law and can expose you to risks. You could check out popular streaming services that might have the movie available for a fee or subscription.
It depends on which manga you're referring to. Some are completed, while others are still ongoing. You might need to provide more specific details about the manga for a precise answer.
Well, to know if a manga is finished, you need to check the latest updates from the publisher or the official manga platform. Sometimes it's clearly stated, but for some less popular ones, it might take a bit of digging.