Are there any real online job or there all scams

The majority are fraudulent - I wouldn't say they all are.

You can get work at home, but you will have to find a company that's willing to let you work from home.

As for the jobs you find online, I have yet to find one that's legitimate. Doesn't mean they aren't out there, but I've searched for a long time, and haven't found a real one yet.