setting up ipad as new ipad or back up from another device
Your content that is stored on the cloud (apps, music from iTunes Store, etc.) can all be retrieved from the cloud as long as you use the same Apple ID to connect to the Store.

Other content from other services (e.g. Kindle books in the Kindle app) can similarly be downloaded from their providers.

Only content that was copied manually (e.g. synced from iTunes on your computer) would need replacing the same way you copied them to the iPhone previously.