A:AnswerYou could leave it plugged in, but that is not good for battery life. Batteries like to be run down before they are charged up again. It trains them to last longer.
A:AnswerNo it is nor. You have to purchase separately. Also, make sure you get the correct one that works with the ipad you are purchasing. Some are not compatible
A:AnswerNo built in card reader but it may be possible to plug an external sd card reader into the usb-c port. Alternatively the device can be synced to iCloud encrypted storage for a monthly fee.