1. Yes. I make money by teaching English, selling unwanted items on eBay, and from time to time I sell crafts I make. If you have a hobby for example, making jewlery, you can sell your custom art on websites like ebay or etsy.

2. In order to succeed in the online world, you must market yourself properly. The internet is full of people who wish to do the same. But if you do not provide a marketing strategy you will simply not be succesfull. Social media is a great tool! 

3. I live in the  USA, and making money online can be rough, as I stated above in #2 its all about how you market yourself and your product. Making money on the internet is no easy endeavor, but with a commitment you can go far :)