Just a few questions

I just downloaded ckeditor and have a few questions. If you could answer and/or point me in the right direction I'd greatly appreciate it.

I've implemented languages but it only shows 3. How can i get the rest to show?

How can I disable level 1 headlines?

Is there a specific method for inserting this data into a mysql database using php?

Also, how can I pull the data from the database and display it on a page. I know how to do it with a regular textarea/input box already. However, I'm curious as to how I can securely save "code" to the database. (i.e. save something like "<h1>foo</h1>" without it actually performing a level one header).

I uploaded a "spoiler tag" which works in the editor but not when i post it on a page. How can i fix this?

Is there anyway that I can edit the CSS in the file?

I tried using javascripts "keyup" function to work with ckeditor but it did not work. Is there a special method used to do this?

Thanks for reading. Any answers to any of the questions are greatly appreciated.