Yes, it uses data. How much depends upon what you're doing on it. Downloading books uses very little data. Downloading and/or streaming music and video can use a lot. Yes, you can transfer music via USB cable from your computer. Yes, it's Bluetooth enabled. Support for Fire HD 8.Is there a camera on a Kindle Fire?
The Kindle Fire HD has a front-facing camera that’s meant to be used for video calls using Skype. But there’s not an obvious way to use it to take pictures or record personal videos.