i have MANY questions about my new iphone?

[zuse1000us]

i figured i would answer this question becaues no one else is probably going to. at least they never answer my long questions like this.
1) it will not cost you money to listen to your already downloaded music. now if your listening to music through an app like pandora it will just go against your data

2) if you watch high quality videos it will just use your 2gb data faster. This might might make more sense in my later answers

3) music and videos you already have downloaded do not cost money or go against your data

4) when your downloading or on the internet or playing an app it all uses data. So the more games you play the more data you will go though

5) you already pay for the 2gb of data. so if you use data under 2 gb it is part of your plan. but once you go over it will cost you liek $10 per 1 gb. at least thats how it is with at&t