Noida Extension buying: What's the *real* all-in cost?

Honestly, I'm so fed up of renting, finally decided to buy in Noida Extension. Looking at a 2BHK in Sector 118, around ₹70-80L. Builders like Natures Green quote a base price, but kitna upar jaata hai final cost with stamp duty, registration, PLC, and parking? Are there hidden charges that only appear during possession? Kya kya cheezein dhyaan rakhoon to avoid surprises? Share your experience please.