Are the VIN number and chasis number on the vehicle the same? If not, where can i find the chasis number on Hyundai tucson?

Short answer is no.
The VIN number is usually on a small plate attached to main chassis, often on the side of the bike.
The Chassis number is usually found stamped/etched into the chassis on or around the steering pipe (the forward most point of the actual chassis frame). This can be hard to see but it should be there.
The Engine number is often found stamped/etched into the top of the bottom end of the engine, Sometimes near the oil cap.