Bengaluru property buyers, hidden costs ka kya scene hai?

Visited Prestige Group's project near Nayandahalli last weekend. Honestly, first property hai toh thoda nervous hoon. They quoted ₹1.2 Cr for a 2BHK but then mentioned PLC, parking, and maintenance advance. Yaar, yeh hidden charges ka kya scene hai? All-in cost mein kitna extra lag jaata hai? Kaise pata chale aur negotiate karein? Any advice?