You can change the settings on the iPad so that if you buy a song or app…
iPad Basics Part 15 – Setting up Email on the iPhone
When you start with your iPhone or iPad you have to tell the device where to collect your e-mail from. This requires you going through a series of setting up questions.
Generally, these questions are straightforward. But it pays to take the step carefully to make sure that you put in your correct username and password, that you make the correct choices about calendars, contacts, and so on.