Hi Alok,
See the CR licensing info here.
http://scn.sap.com/docs/DOC-21575
The licensing aspect for CR 2013 should be simillar to CR2008.
As for the java SDK development Runtime for Web apps is free to distribute within your org. If the app will be distributed outside your org, you will need additional licensing and for that you must contact sales (866-681-3435). Worldwide Office Locations | SAP.
Thanks,
Bhushan