I know this will sound very "noobish", "noob" or "noob-like", but how do you make a new stuff in Morrowind?
To be more specific, I've searched the CS and can't find anything saying "new". I want to make a new area, item, character, etc..
So, any way you know of?
Thanks.

Not a "newb" question, but is rather broad in scope. You should try these tutorials http://www.gamesas.com/index.php?/topic/24-comprehensive-tutorial-and-useful-link-list/ first.

Good luck and have some fun!

Right click on an item and enter a new name in the ID section. Click on save, then a window should appear saying "create new object?" click yes. You now have a copy of the original, under a different ID which you can edit.