Always On Licensing and it's Cost

Hello All,

We are planning to configure Always on, we need your help to let us know the best license which we can use with Optimal Cost. I get to know that we can use it for Enterprise Edition only, can you please confirm same?

We have 4 cores(8 Logical Processors) machine and planning to install SQL Server 2012. Do we need to purchase extra license for the Secondary node though we just need to fetch the reports from it?

We need list of the SQL server and their Edition on which we can configure Always on. 

Regards,

Jiten Pansara