If you want to get technical, I earned about 10 cents the first month I was here.
If you're looking for a real profit, though, it will take a lot of time and dedication. If you think you can post one or two articles a week and make a living, you may want to seriously reconsider. You have to be very active, every single day, and work at it for a long time to even make a decent amount. No one can really give you an exact time amount. If "blogging" is what you want to do to make a decent living, you should consider having your own blog as opposed to hubpages - I think you'll earn a lot more that way, and you can control advertising and such. Google can help answer these kinds of questions, too, especially when people post about their own experiences earning money this way. Good luck!