Editing Quick-Tag Labels and hide some buttons

Is there a way to change the Label of the Quick-Tag Buttons?

e.g.: "b" becomes "bold" or "i" becomes "italic"?

And is there a way to limit the amount of Quick-Tags? I want to deactivate "ul" "ol" "li" "code" and "spoiler" because that ist not usefull for my Users. I think too  much options to choose don't help to disquz proper. For some Users (esp. older ones) is this too complicated.