#1
i havent finished the song yet, i will when i'm done, but im writing kind of a grungy song, and i need a cool edgy punk one or two word title ex. Negative creep, sliver, dive, stain. And do you think if my guitarist came up with the intro chord progression and i write the rest of the song, do you think he should be included in the writing credits?
#2
Absolutely, no matter how much he contributed to your song, he still contributed so he deserves some credit. As for a title I don't know as I havent heard your song.
#3
yes he would be IMMEDIATELY added into the credits.

considering i have no idea of the song, meaning of the song, style of the song, tempo of the song, lyics of the song i have no idea what to name it so ill write the first word that comes to my head

Brass