Query for SAP NW 7.0 and ECC

Dear ALL ,

We have purchased SAP NW 7.0 License .We have installed it with 2 components WAS ABAP and WAS as JAVA.

Now my question is: this SAP NW 7.0 installation does not contain any functional module like SAP HR.MM,FI etc...

for this requirement do we need to take a separate license of SAP ECC or do we need to install some contentson this SAP NW 7.0 server so that we can run functional code on this server????

Please suggest....

Thanks

sandeep