I don't have a landing 'home' page

HI I really don’t understand: the theme’s default page is one of my menu pages. I want the landing page to be like the one I see on the mock up on your website – a photo slider with the top right hand side menu. I don’t want it to scrool down forever. How do I do this? Why don’t I have a ‘home’ page? I migrated from an oder wordpress theme that didn’t have a ‘home’ page, could that be the problem? NOw how do I create a home page with a photo slider?