[TYPO3] How to change the typical page content elements?

[Lars Axberg]

Hi all

I'm pretty new at this, but I want to know if it is possible to change the
css/html template of the typical page content elements like text with image
etc.?
Is it done with typoscript of how do I redefine my css style for headings,
paragraphs and so on. I would also like to wrap each content element in a
div box with a border around it, can I only do this by making my own FCE
forms? 

- Lars Axberg