find (probably in header.php) the part between
<div id="title"> and the accomp. closing div, and delete that. You'll lose the 'rss' thingemie on the right as well.
In the NAV bar, you probably mean that pinkiesh color, but I could eb wrong. If yes, find this
#menu ul li.current_page_ancestor:hover a, #menu ul li.current_page_ancestor a, #menu ul li.current_page_parent a, #menu ul li.current_page_item a {
background-color:#5D0075;
}
in this file: /wp-content/themes/freshy2/custom_my_style.css, and change the #5D0075 to something of your likings.
I don't know where the 'customize page' is, but the only way to change fonts and sizes is via the stylesheet.
Peter