I always have this conception that toyota cars are more fuel efficient but are there other car models that are better in that aspect?

Yee-Ling, It is all about preference, "yours" to be exact.  All 4-cylinder engines are the most fuel efficient.  The newer the car the more efficient it will be; but there are some tricks to keeping any vehicle running smoothly which is a big part of how much gas it drinks per mile.  Regular tune-ups, oil changes and tire inflation maintenance as well as the tread depth.  Don't forget about the transmission if the transmission isn't working properly the gears don't shift at the proper speeds causing your engine to work harder and burn more oil and fuel. And most importantly  how you drive. Maintaining a relatively safe speed on long drives, not using your Air Conditioning and no hard stops and fast gos will help keep your fuel waste low.  Elizabeth; Vehicle Remarketing Specialist

If you are just looking for estimated MPG, you might want to look at Suzuki.  For example, the SX4 Crossover is and estimated 30 MPG.  Suzuki has come a long way in the import market.