Quieres naranja?
There is two ways to say orange in Spanish, the meanings are different though. Naranja is Spanish for the kind of orange you eat and anaranjado is Spanish for the color orange.
tengo una naranja
To say 'I want bread' in Spanish, you would say 'Yo quiero pan.'
¿Quieres una naranja?
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.'
Yes. 'la naranja'= the orange 'una naranja'= an orange
To say 'I want to eat a carrot' in Spanish, you would say 'Yo quiero comer una zanahoria.'
Cat is "gato", orange (both the color and the fruit) is "naranja" with the j making an h sound. In Spanish the adjective follows the noun, so if you meant to say "the orange cat", you would say that as "el gato naranja." I am unaware of any kind of orange called a cat orange, but if there was one, the Spanish for it would likely be "la naranja del gato".
"I want to sleep" would be "Quiero dormir".