When we answer questions like Where are you from? and How old are you? we don't usually reply with full sentances like I am from Brazil or I am sixteen years old. One word or short phrase is usually enaugh - Brazil or Sixteen. If we really do not want to answer a question, we can say: I'd rather don't say, if you don't mind.
If you want to ask a more personal question, you can add if you don't mind me asking.
If you want to ask a more personal question, you can add if you don't mind me asking.
