Grunge theme problem

Hello,

I recently installed a new theme called grunge and I’m having some problems with it. I bet it should be easy to fix but as a wp newbie I couldn’t figure out.

1- After I installed the theme I’m having an error at the home page as seen on here:

http://666kb.com/i/clhdar1cdvyq7cq8h.jpg

2- Besides, I don’t want that page as my home page. I just want classic WordPress homepage where visitors see my posts when they enter, just like this:

http://666kb.com/i/clhddbrwre8zyo5ap.jpg

How can I make it?

Any help would be appreciated.