It's so refreshing to see this site used for something productive rather than bitter and twisted nastiness.
Airlines i have worked for supply Jepps. Sometimes they issue the individual pilots with their own complete sets and the amendment packages arrive in your company mailbox and it's up to you to keep them up to date. On long haul operations the aircraft will have a flight library with a complete(sometimes worldwide) set of jepps but the crew will be given a trip book covering the days operation.
On the headset front, the aircraft usually have them installed for the crew and you give it a wipe with a little disinfectant pack to keep it relatively clean. Some crews do bring their own but getting it through security may start to become a problem. Rules vary but headsets are rarely worn i the cruise.
Don't worry too much about the hour requirements. You'll learn so much and have experiences that will stay with you forever, meet unique people, foster lifelong friendships around the world while your building your hours.
Ask all the questions you can think of, even if you think it's silly. Nobody ever died of embarresment.
Enjoy.
dt