..

Have you ever interviewed for a job before? Worked retail?
"looking the part and if I should bring a resume and other things related" ?
This is common sense dude. Dress professionally, better if you wear LV stuff, and OF COURSE YOU BRING A RESUME!
You better be good looking. Have worked retail (in a higher end store) before.
Study fashion or business?
If youre actually serious about this, you shouldn't be asking on Hypebeast.
They won't hire you, or even take you seriously.

Why would you want to work there? The pay isn't much more than a regular retail job.
Work your way up Old Navy -> H&M -> Express -> Jcrew ... -> LV, Gucci, Fendi, Prada.