Regarding the add to cart box:

You have two stylesheets that are being loaded. stylesheet090728.css and stylesheet.css. They contain some of the same rules at least so you need to be careful about which you alter. The stylesheet090728.css gets loaded after the stylesheet.css so will over-write the other one where that happens.

Fisrt you need to add a new rule:

Code:
#productTellFriendLink{clear:both;}
Then you need to float the #addCart left instead of right. As it stands you need to do this in stylesheet090728

Code:
#cartAdd{float:left;}
It would be better to find the existing rule and alter that accordingly.