A:AnswerAll of the apple pencil versions are compatible. However, if you have the first gen apple pencil then you need to use the adapter it comes with to pair it with the ipad A16, because it has a lightning charger end and the ipad has a usb-c charging port.
A:AnswerI believe they can, but all you need to do is sign in with your iCloud account and it will do it automatically. Just make sure on your older device, that you have iCloud backed up, as well as the photos and everything else you want to be transferred.
A:AnswerThere was no charge for a transfer from old to new. Simply part of the new iPad setup. It walks you through the process when first setting it up.