I'm the first time car buyer. I'm 6 ft height. Searching for a tall car with 5L budget. Petrol. Is wagon r mileage is poor. Will it give 15 kmpl in town?

@SVP I’m the first time car buyer. I’m 6 ft height. Searching for a tall car with 5L budget. Petrol. Is wagon r mileage is poor. Will it give 15 kmpl in town??