And again, here is what I learned today:

1. how many - quantos
2. four reais - quatro reais
3. five reais - cinco reais
4. what do you want? (to a man) - o que senhor quer?
5. I want to eat - Eu quero comer
6. I want to eat in the hotel - Eu quero comer no hotel
7. what do you want to eat (to a man) - o que senhor quer comer?
8. you want to eat? (to a man) - o senhor quer comer?
9. nothing - nada
10. I don't want anything - Eu não quero nada.
11. some thing - alguma coisa
12. I want to eat some thing - Eu quero comer alguma coisa
13. Do you want to eat some thing? (to a woman) - a senhora quer comer alguma coisa?
14. I don't want to eat here - Eu não quero comer aqui
15. Where do you want to eat? (to a woman) - onde senhora quer comer?
16. Let's go - vamos
17. Let's go to eat - vamos comer

You left one out. My version must be different from yours.

"Eu não tenho muito reais mas quero comer a senhora. Cuanto quer?"

We got into an interesting discussion on "Alguma Coisa" I was tiold by locals that they would never say it that way. They would merely say "algo"

IE: E quero comer algo