Student or Learner
I used to have it before.
I had it before.
I had it when I was a child.
When a kid asks you "Do you have this toy?", you tell him you had this toy when you are a child.
Can we use the sentences above?
Or keep it, but use it to add information; 'I used to have it, before the <noun-notable-for-having-happened-in-the-past>'.