1. I didn't sign the payroll book, my first day will I still get paid for that day ?
You will not get paid unless you wrote the hours in the timeclock correction book, clocked in and out or the person in charge of you said they would take care of it(which probably will not happen). Speak to your payroll person and make sure you get paid for your first day.
2. When does the pay period start and end, is it Saturday - Sunday 12:00 am ?
Sunday to Saturday is the pay period.
3. How can I get more uniform shirts ?
Ask a store manager if you can get another shirt. If there are a lot of new hires, they might not have enough to give everyone two,
4. Do I get paid for all hours of orientation and training ?
Yes, just make sure you clock in for everything. Never do anything off the clock.