Call Center Training/Holidays/Exact days of pay??

I just got offered a CSR job and I begin training on November 16. The training is scheduled during the holiday season and with the Tues-Sat schedule, we are supposed to be working on Thanksgiving, Christmas Eve, Christmas, New Years Eve, and New Years. I was just wondering if anyone has any idea if we will actually be required to work on those days, and if so, if it will be the full scheduled time (10-7). Also, what is training like? Do people dress professionally, or is it more casual because it's training? Also, I was told we will be getting paid every other Friday, but I'm trying to figure out exactly what days those are and how soon after starting training do the paychecks start. It's really close to Christmas time and I want to figure out if I will have any money for presents. I would love to hear from anyone who has been through any of this!! Thank you ahead of time for any help at all!