No posts or page on Home page
 

Is it possible to only have your menu and header on the home page without any page, posts or sidebars?

yes, copule of ways.
1) Edit the code
2) modify the loop code in the 'Style & edit CENTER COLUMN' to not show on the home page
3) create a static empty page - make that the home page, tell Atahualpa not to display the sidebars on that page