need help- Aligning Header, background, footer

I new to all this, so I need some help with some aligning. I modified I template. I set the css to match on width, body, header and footer. That didn’t work so I tried increasing the size of body, that didn’t work I ended up with a shadow around the page. Then I decreased the size of the header that hasn’t worked.

Any suggestions?

Also does anyone know how to prevent the page title from showing up at the top as a header in the body content?

thanks