If you have Microsoft SQL Server as Database, so you don't need to purchase License for support of SQL Reporting Services, but there is an issue with SQL Reporting Services, SQL Reporting services only Compatible with IE. check these links ...
http://msdn.microsoft.com/en-us/library/ms156511.aspx
SQL Reporting Services - Print Button not shown in Mozilla
On the other hand, If you use other than Reporting Services, You need to purchase License.
