Oktoberfest in Germany is a unique, once-in-a-lifetime bucket list adventure. The festival itself is free to attend. You only have to pay for the beer, food, rides, and games.
You can find traditional German food in food tents scattered across the fairgrounds. These food options are generally bratwurst, currywurst, or pommes (fries).
Given the time of year, it will be chilly out, so keep that in mind and layer up. If you want to get into the Oktoberfest spirit, consider delving into traditional German attire.
Since Oktoberfest occurs in Munich, it is most convenient to stay in the city and use public transportation. Hotels sell out quickly and can get expensive.