Protection against Contigent Liablilty arising after buying property

I have planning to buy a property in Navi Mumbai- 1) The seller is not having the letter of allotment of parking issued by builder. Even Builder doesnt have the records as he has handed over the society, Society secretary say parking were issued by builder and they dont have the record. 2) Seller is the second owner of the property, Conveyance deed is in process, so I am not sure that whose name had been applied for the conveyance deed. 3) In kharghar the Panvel municipal corporation has raised the demand for Property Tax from retrospective effect from 2016, which the kharghar federation is opposing in the court. Issues: 1) Do I need to get indemnity bond signed by the seller for all these issues or there is any other way to deal with it, as For parking - the flat number is already embossed in the parking area For conveyance deed: if the conveyance deed is done in the name of the first owner then CIDCO transfer fees of around 1.5 lakhs will be liable. For Property tax the Kharghar federation is opposing the same so its difficult to ascertain if any liability will arise in future. Thanks, Sanjay