To create a database using cPanel, login to it at
http://yourdomain.x10hosting.com:2082/ as usual, and choose MySQL databases. Use the add database section to create one. Then you need to create a MySQL user, there's a section of the page for doing this if you scroll down a little. Next, use the add user to database bit to link the username and database.
Also in cPanel is an 'IP Deny Manager' section. Just open that, type an IP address and click add to ban it.
As for your question about the forum, I need you to elaborate on what you're trying to do - I don't understand what you're after.
-Luke.