I believe the most appropriate way to say those sentences would be: He told it to me two weeks ago. They gave it to me as a present. Informally, you can drop the "it" in the first sentence because there is an understanding of context. Like if the person you were talking to asked "When did he tell you that?" you can simply reply: He told me two weeks ago. It is understood that you are talking about "that" so you don't have to say "it".