found
Found is the past participle of the irregular verb find. Follow the link to find out more and to listen to some examples.
more information: find
it's
When it's is spelled with an apostrophe, it's short for it is or it has. Follow the link to find out more.
more information: its & it's
used to
Here used to means accustomed to. Follow the link to find out how else to use the expression used to.
more information: used to
leap tall buildings
He means that they can do amazing things and they can do just about anything they want.