My first home hunt: Delhi's true costs are baffling

Honestly, I completely underestimated how confusing the real cost of a flat is. I'm looking at a 2BHK in Karkardooma, maybe with Garg Group, around 1.5 Cr. But then there's stamp duty, registration, PLC, parking... and my parents keep mentioning hidden charges at possession. What's the actual all-in cost? Should I budget way more than the base price?