Images in posts and lightbox not working..

Hello,

ive got the theme called Phogra and im butchering the code to make it more minimalistic and static.

The problem is that it will only show the featured image in the blog and no others. I would rather have it showing the ordinary post images (full content) and use it with a lightbox. Which does not work either.

I cant get my head around this, feels like im missing out on something. I cant find any excerpt either. Feels like it could be the problem in some way. I have tried z-index variations also. The lightbox may collide with the built in gallery slider in some way?

Feel free to take a look at the code over here, and its pretty messy i know:
http://www.vitalisfoto.se

original:
http://demo.templatypus.com/phogra/