Sorry, WordPress.com does not offer phone support at this time, but we can help you out with these issues.
We volunteers do not have access to premium theme you are using, but if you go to appearance > header, is there a place where you can set the color of the site title? If so, set your site title color to something other than white.
On the menu, you have two ways to go. By default, the top navigation menu will show all pages that you create. If you wish to show other things in the menus, or you want to make menus with submenus, you will want to create a custom menu.
Create a new menu, add the items you want to the menu and arrange them as desired, save the menu and then assign that menu to the primary menu location by selecting your menu name in the pulldown at upper left on the menus page in the theme location module. See this support document on the custom menus and let us know if you have any problems.