Gst rate on petrol and diesel?

Fuel and alcohol are exempted from GST. This is to protect the revenue stream of the state govts.

I have booked a Renault Suv Duster and let me know whether i have to pay more since the new gst taxation is in effect from 1st july,2017

Prices of cars have generally reduced post GST. I don't think you will have to pay more. If at all, you should instead check with your dealership whether you are entitled to pay lower. If you do not get a satisfactory answer from them, you can tweet to the official Renault handle to get your answers.

Kindly share me what's the gst rate on diesel and petrol.
how can calim itc on diesel and petrol?
actually I got a purchase bill of petrol and diesel and I notice that vat was applicable on that bill.
please give me knowledge about that I've no idea how will be enter In tally