Alright, there are several things.
Look for rust in the engine bay or by opening the trunk. Rust in both areas indicate accident.
Look at the horn area, dented front chassis bar or (gaadri) indicates accident.
Coming to the interior, brake clutch or race pedal fading can tell you the mileage easily. Corolla's rubber on the paddle starts getting fade after 50,000-80,000km. If someone has changed that padding than just pop the clutch, if it's hard than car is driven above 50k kilometers.
Check meter properly, any issues with needles can indicate meter tampering.
Rest is upto you. Do drive a good condition same engine car before buying so that you can get an idea about the genuine condition of vehicle.