@Liat0 - there are many resources in the community that can explain the pricing and payment issue you are experiencing. A quick search here and in the help section will resolve this for you and you will understand. For your convenience: https://community.airbnb.com/t5/Hosts/Contact-Airbnb-A-Community-Help-Guide/m-p/16165#M728
@Sheil0 - As a host, you cannot see last names until the client is booked. This is for their protection. After they have secured your listing, you will see both. However, at any time, you, as the potential host, can ask for more information from the guest. If you are not comfortable with the answer, decline their request. A perfect example of varying levels of acceptable information is your profile picture. I would ask you to upload a photo where I can visually identify you. If you did not, I would decline because I would be uncomfortable letting in someone into my home who I preceive is trying to hide their identity. For some hosts, including you, this veiled picture is perfectly fine and would not be a problem.
Ditto for staying with someone - I won't book with a host who's picture is unclear. Personally, I think guests make an assumption about the type of host you are based on your profile picture. IF you find yourself getting a lot of requests that make you uncomfortable, you might change out your picture to be one of your smiling face instead of your bikini-clad body. so YMMV.