僕はただで切符をもらった。

I; me; you; manservant

topic marker particle; indicates contrast with another option (stated or unstated); adds emphasis

ordinary; common; usual; free of charge; unaffected; as is; safe; only; merely; just; simply; but; however; nevertheless

indicates location of action; at; in; indicates time of action; indicates means of action; cause of effect; by; and then; so; indicates continuing action; indicates certainty, emphasis, etc.

ticket

indicates direct object of action; indicates subject of causative expression; indicates an area traversed; indicates time (period) over which action takes place; indicates point of departure or separation of action; indicates object of desire, like, hate, etc.

to receive; to take; to accept; to get somebody to do something