I have a bunch of american bills my aunt gave me and where can i change it to Canadian in toronto ?

Question

(without my parents knowing and preferably no identification needed)

Answer 1

At a bank.

Answer 2

Is your aunt expecting you to give her the money or is this a gift?

If it's a gift, just spend it.  I've never encountered a Canadian store that wouldn't take USD.

Answer 3

Most major banks exchange foreign currency. You can also look up "foreign currency exchange" in the phone book. A lot of travel places do foreign currency exchange, too.