From the Start screen, swipe left to display the apps list.
Alternatively, tap All apps (located in the lower-right; may require scrolling to the bottom).
From the "all" screen, tap setup account (for initial setup).
If necessary, swipe left or right to locate the "all" screen.
To add more contacts after initial setup, navigate: More icon > Settings > Add an account.
Select the desired account (e.g., Outlook, Google, etc.) then enter the appropriate info.
If the desired account is not available, tap Advanced setup then select from the list.
To add an individual contact, refer to Add a Contact.