My house was built in 2008 and was empty for a while I moved into it in may 2011 and just now have issues with bubbling toilets, where would be the first place to look?

Hi Kent and welcome, I would look into snaking out the drain, my guess is you have a partial blockage.. Hang tight, an expert may have another thought.

I agree with snaking but I'd snake the evnt tsack from the roof. This sounds like a venting issue