Newbie Question

HI,

Sorry to ask such a dumb question. im new to wordpress and wanted to create a portfolio type of page like the example where it has some contents on the left likfe the Coffee Cup and Black Nail Polish that you can click on for more information.

I dont really understand how to add this so you get the little boxes with images and text in them. Is that done in the Add Page or is this a gallery or something ? Ideally i wanted to get h old of the demo in my local wordpress so i could see how its built but cant find a way to do that. Just trying to get a kick start to understand how you build something like the demo from scratch with this theme.