The first one is right but it is incomplete, for the second you would have to say "a friend of mine asked where could I buy tickets" and in the third you can say, "my father told me how to save money" or my father told me how I would save money"

The first one is right but it is incomplete, for the second you would have to say "a friend of mine asked where could I buy tickets" and in the third you can say, "my father told me how to save money" or my father told me how I would save money"