There's a few great apps out there, if you have the time to learn how to use them — aaaand the money to pay for them. Adobe After Effects 1 year: $250, Cinema 4D R23: $3,495, Screenspace 1 year: $468 or an agency at $500/day
Nothing. Rotato is not a plug-in. It's a standalone app, and it will guide to you get results in a matter of minutes after you download it.
None. You don't need any super-hard-to-learn and even harder-to-pay apps like After Effects or Cinema 4D.