Please correct my sentences

hello,

i'am learning English , and i need someone to correct my exercises

Describing a car engine : It's the main part of the car,made of metal ,It turn the petrol to a mechanical energy which allow to the car to start or increase its speed .

Describing a television: this object made of plastic reflects images and display videos throw screen made of glass ,in it's front there are buttons to turned up or turned down,and for others configurations , on its back there are inputs .

thank you