How many pops (in one season) does a World-Renowned Trainer get?
This isn't easy to answer, it completely depends on the player and his age, potential, height, sublevels etc.
How many MORE pops does a World-Renowned Trainer get than an Advanced one?
I would say that a World Renowned Trainer gets about 5 weeks more training than an Advanced trainer.
How much salary does a World-Renowned Trainer raise each season?
The amount that the salary rises depends on what the initial salary is. The lower the initial salary, the lower the amount it raises by will be.