What is the responsibility of a prince as it pertains leading the people of his country, exemplary roles

Question

what examples will he have to set for youths? what are the dos and don'ts of his life. can he lose his royalty? if so, how?

Answer 1

The prince is just a symbolic future head and part of the monarchy who is expected to have a decent and respectable life.

Answer 2

The main responsibility of a prince is to produce an heir and a spare.

Other duties include being paraded around while not embarrasing the country too much.

Other than that - everything else is pretty much open.  No real duties are involved in most countries w/ a monarchy.