Warning/Fatal Error after wordpress updates

I was doing some updates to a friends website, http://ift.tt/1zrxoy2 and ran into some big problems after completing the updates.

After completing the updates (most notably wordpress update and woocommerce update), the website was working, but the pages were showing up blank. I decided to start reverting the updates. I started off with wordpress, and tried to install 3.9. Once I did that I started getting the error that is currently on the website.

I NEED HELP! lol...not really sure what to do at this point. I did a backup of the website using backwpup prior to any updates, but I am not sure how to run the backup...if I did run the backup will it bring the website to its state before the updates?

Any help is appreciated.