You can add a personalized greeting to your automation pro emails. You can include a greeting with the contact’s first name, last name or both. You can also use contact details in your email layout, an alternative text is available in case the contact has no details in the list. To learn more on how to personalize your emails please Click Here
Note: In Automation Pro you can only choose one contact list to merge contact details from. It is encouraged when adding multiple lists to an automation, to make sure the details of every list are mapped identically.
Also to learn more about how to map fields in your contact list using Benchmark please see: How do I add custom fields to my contacts list?