Confused about static page

Hi, I'm really confused about the static page. I have my post slider images on the default page (they work find) I then just wanted to add some information with images underneath (which I made as a post) and the images with the post do not show up. I created a custom menu but I'm confused about the default page (which I put my featured post slider on) and the static page option. Do I need to start over and create a home page and put the sliders on that page? Then do you need the default page? Also, is there a way to get rid of the white boxes around all of my posts, images, widgets, and side-bar? I'm just starting the try to set this site up and would love any information you can give me. My website is: http://www.rainehollister.com/ Thanks, Raine