Transactional replication errors

I'm trying to set up transactional replication in SQL Server 2012 using AdventureWorks 2012. And right at the end of the publications setup i get the following error:

SQL Server could not start the Snapshot Agent. Additional Information: An exception occurred while executing a Transact-SQL statement or batch. (Microsoft.SqlServer.ConnectionInfo) SQL ServerAgent is not currently running so it cannot be modified of this action. Changed database context to 'AdventureWorks2012'.(Microsoft SQL Server,Error 22022)

I'm guessing this error isn't allowing me to execute the following code:

USE ADRepl;
SELECT * FROM Person.BusinessEntity

As every time I do execute this I get the following error:

Msg 208, Level 16, State 1, Line 2 Invalid object name 'Person.BusinessEntity'.