1) Try running the sql script from the following thread to recreate the cms contents for the support menu:
3) I dont see any border around products on your page, please provide a screen shot showing what you would like to change.
4) in the powerstore/webassist/themes/Bananatree/css/purple_styles.css file, cheange the width of the #cssmw li a selector
5) in the powerstore/webassist/themes/Bananatree/css/configurable.css edit the size for the h2 selector to change the product font. the description font size is set in the content management in the admin panel. you may need to set the HTML Editor instance for the description into Source mode to see the font size setting.