#How to start with TYPO3 in 2013 6.x Versions mentioned. Based on personal experience.
You should at least be familar with HTML and CSS . Some JS knowledge is wise to have. After you are familar with these things you are able to dig into CMS business. If you don´t have a clue about it, you will get seriously frustrated.
If you dig into TYPO3 you need a lot of time to understand it.