FooBox free not open

There are javascript errors on your page, which is stopping FooBox and other plugins from working correctly. If you look in Chrome dev tools you will see that jquery is not defined for foobox and a few other plugins. I looked through your theme and the theme seems to have it’s own embedded version of jquery 1.8 that it is loading. (this is not best practice and not recommended)

A way to test this is to switch to a standard WP theme, like twenty fifteen and then see if the page loads correctly and FooBox works