Please Help: VAT on amount charged by the builder after possession of flat

Hi friends,
I am from Madhya pradesh.I booked a flat which is under construction. The price of flat is 2000000 (excluding registry charges & Service tax)which is payable in installments during construction period. I have to pay other charges (external maintenance charges, for 3 years, electricity charges, Water charges, society maintenance fund, club maintenance charges for 3 years, registry charges)after possession.Builder charged Service tax on flat price( ie. on 20 lacs) and also on Other charges mentioned above. He also charged VAT on Other charges mentioned above.
In addition to the above he also charged PLC on last installment at the time of possession of flat & Service tax/VAT on such PLC charges.
My queries are as follows:
1) Whether Service tax is chargeable on payment of installments of Flat price ( ie. on 20 lacs)?
2) What is PLC & whether it is chargeable to Service tax/VAT ?
3)Whether Service tax/VAT is chargeable on other charges mentioned above ?
4) What is the rate of Service tax & VAT (if chargeable) ?