Engine performance not ok when first move. And very poor fuel efficient

I got mileage of just 10km. And if I filling petrol when low fuel indication shown with 300rs 3 times it again showed low fuel. I filled a total 900 rs petrol (300rs x 3times) in range of 10 km, then again shows low fuel indication. I don't know what kind of fuel meter they fixed. About engine power it is amazing. But if i just stop (not ignition off) in traffic or somewhere else then first moving is so difficult. The vehicle is not moving up to high acceleration. Then sudden jumping occurs then at that time if break apply, vehicle still moving. Minimum 4 to 6mtr after it stops when brake applied. I'm telling this on first move. Even reverse also facing this problem. About 6000km over. Driving this vehicle is so horrible in our roads. This can make lot of accidents. Don't think that i don't have experience in driving. Last 8 years i drive many cars but this is my first experience with this kind of problems