If you are talking about the 4 on top of the other 4 it means that there are 4 beats in a measure. if you are talking about the f at the bottom that means forte, or loud (play loud)
Arpeggio. what else can one say to answer this quesiton?
crime drama. although, there is some humor, this movie has mostly drama...
Song name should be: no ideas (the actual name idea)
medium, and guitar.