That static image option is there only in Pro version where you can use Image Slider and then just upload the image and leave the Link URL empty.
I don’t recommend changing the menu item font size as it is fixed header and it will look odd. But if you want to make it bold then you can add the following css:
#header-right .widget ul.menu a {
font-weight: bold;
}
For footer address, you can change the font size in the following css and then add in.
#footer-sidebar .textwidget { font-size: 14px; }