Not sure what you mean about bustedout vs bustout...
The "inheritFont" attribute of the <tdbutton> token allows the button to inherit font settings (font name, size, italics, bold, etc) from the cell in which the button is placed. There is also a "style" attribute which allows you to apply any HTML style.
For layout cells, just use the various settings of a cell Property Set to change the font appearance. If you want to go beyond that, you'll have to learn a little bit of HTML. But there are tons of HTML tutorials available on the internet.