Increasing size of featured content and font

Hi There, Could someone please help me with increasing the size of the featured content images and decreasing the space between and on the sides of them? I would only like a small white border between the images. I have used 4 images, but they don't go fully to the side bar and there are huge spaces between them that I want to eliminate. You can see what I mean here if it is helpful: www.fantonphotography.com Also, is it possible to change the font type of the text below the featured content? I would like to use the font that is in the main menu bar. Thank you!