To say 'I want a car' in Spanish, you would say 'Quiero un carro.'
manejar means to drive. if you want to say "i drive" you say "manejo"
To say 'I have a car' in Spanish, you would say 'Tengo un carro.'
To say 'I want bread' in Spanish, you would say 'Yo quiero pan.'
To say 'I want meat' in Spanish, you would say 'Yo quiero carne.'
To say 'I want cereal' in Spanish, you would say 'Yo quiero cereales.'
To say 'I want paper' in Spanish, you would say 'Yo quiero papel.'
To say 'I want a chair' in Spanish, you would say 'Quiero una silla.'
Manejar, conducir.
To say 'I want to eat a carrot' in Spanish, you would say 'Yo quiero comer una zanahoria.'
You can't actually control a car but if you click on a house or lot you will automatically drive there (if you don't own a car or bike you will automatically take a taxi). So you can say where you want to drive but don't actually drive yourself. Hope this helped :)
An automobile is called "Automovil" in Spanish.
"I want to sleep" would be "Quiero dormir".