For training, it all depends on what department they put you in. For Outbound it'll be loading trucks, ART (unloading trailers) for Inbound, and cartonnaire/hand puts (picking/backstocking in an order picker) for Warehouse and MBP, though MBP may also have you support the packers ('feeding') when you start. Honestly not sure about FacOps if that's where you're going. In each dept, there's other roles and equipment they'll train you in during your 90 days, but usually they'll wait til you have mastered these basic roles before moving on in training.
As for paychecks, they're distributed weekly, every Thursday. I got mine my first week.