How to i access to FTP?
You can't OFW only permit upload images.
Can i put ads in my website?
No, while you has a free account.
Can i change website name?
No you can't do it, the only way is register again.
Can i register in OFW with the same email in two account?
You can't, you need register the new user with other e-mail account.
How to i add my website in Google?
To send your website to Google, you need complete the form in this URL: http://www.google.com/addurl/