Hi @Krishna
1- Averaging up of position cost price is something industry standard. But you can find individual trades and their cost price in ‘Manage Position in Detail’, by clicking that position. Similarly for stocks & ETF in holdings
2- Charges on individual trade is available in Contract Note available in My Profile < Statements & Reports< Contract - You can email that contract note to yourself by simple click.
3- Transaction estimator comes before you place order in Order Placement window.
Hope this helps. 