For obtaining info under RTI all you have to do is write your queries pointwise on a simple paper. There are formats available; but use of the same is not mandatory. Yes, enclose Rs. 10 postal order or any other non-judicial stamp of appropriate value as per your query. Your query should relate to the public interest. Since it is ESI, it becomes easier as you may not have to spend on postage. You can straightaway walk into their office and submit your application and ask for the acknowledgement. Yes prohibited information U/S 8 and 9 of RTI Act will not be given to you. The waiting period is of 30 days and then you may go for appeal. For every page that you may require, you will be charged 1Re or as the case may be. For simple information you need not pay anything excpet the postal order.