Cooking A Turkey In A Roasting Bag Help Cooking A Turkey???

Help cooking a turkey??? - cooking a turkey in a roasting bag

I cook some things, like have breakfast and fancy special effects spaghetti recipe, but with 20 years, I never in my life, a turkey to cook. Until tonight. To my friend. They can help a little!
First, what the hell are giblets? Everything I need to remove also said that "small" and the neck? Am I obligated to make butter or anything about her? I cook a roast or Turkey in a bag, there anyting thing that I can use? Instructions on the bag say it will cook for about three hours, maybe more, maybe less. I tried my grandmother to call the cook of the family, is very knowledgeable, but could not reach them! Please help!