Charitable foundation

A Charitable foundation is providing museum services and considering itself as business entity and paying service tax on museum services. My queries are:- 1. if charitble foundation is considering itself as business entity thn rcm would be applicable to it on legal services of advocates. 2. whether charitable foundation would be able to take cenvat credit of service on input service paid. and if yes thn on what services. 3 .if charitable foundation will consider it as business entity, will section 11 of IT ACT of exemption will be available..if no.thn wht provision of income tax will be applicable pls rply soon and solve all above queries