Use any good Synthetic Mobil Oil, Grade should be 0w20 or Max 5w30
Some popular Brands are Liqui Moly, Aisin, Idemitsu, Moly Green
Air Filter, Geniune is costly, Leppon will cost you 400 to 450
Oil filter , VIC Japanese, Toyota Thai made will cost you around 350 to 400 Rs.
Never allow roadside / unprofessional mechanic to touch your car, otherwise they will ruin your car