Site and Header Width and Padding

Hello, What is the CSS is make my site generally wider reducing margins on left and right. Would also like to remove padding above header, below header, above navigation menu, below navigation menu. My site: http://interiorsalvagedesign.com I'd like it to look more like this site http://e63.415.myftpupload.com/cvt-services/ Also is there a way to make the gallery container wider so there are more columns. I'd like the gallery wider. http://interiorsalvagedesign.com/home-tour/ Many Many Thanks! Maryann