Thinking about studying abroad. Pls help! BIG decision?

I am trying to figure out about how much it will cost in addition to tuition to study abroad. One of the major extra costs is AIRFARE. I have never flown before so I need to know how much an average cost would be from St. Paul MN to Poland?? also how much is a PPORT?? As this will be my first time out of the country I have never had to get one before.