You can not earn 10 points for answering your own questions. However, you can add a reply to each person's answer on your question. There are certain rules on this site that need to be followed in order for the site to run correctly and be able to pay people for what they contribute. How fair do you think it is if the site pays you to post this question and now you go and answer your own question. If you knew the answer to this question then why post it here on the site?
You can not add votes to your own comments, you can not up-vote your own comments, and you can't reply to your own questions. I feel that you should read the rules of the site to find out how all this works. Furthermore, the site has one post that you can ask all these types of questions in and get an answer directly from the site. That is what the post was designed for in the first place.