Posting a link to the forum is one of the best ways to show a problem so don't worry about some one thinking you're plugging the forum.
As for the text editor goes can't help you there. But the buttons you refer to are in the navbar. The links under it are the navbartabs. The login is toplinks. You can edit them to some extent in the stylevars but to really get in to them look in vbullentin_chrome.css.
The really simple way to add buttons to the navbar is to use a mod. I use >
https://vborg.vbsupport.ru/showthread.php?t=228507 It's a lot less complicated than jiggering code around in the templates.