Noida mein property ka total cost kaise calculate karein?

Noida mein property ka actual all-in cost pata karna bohot confusing hai. Hazipur mein Brys Group ke projects dekh raha hoon. Base price ke upar stamp duty, PLC, parking milake kitna extra lagta hai? Construction-linked payment plan better hai ya down payment? First-time buyer hoon, kya karna chahiye?