The transitive verb introduce is normally followed by to when you want to mean �presenting someone to another person �. Therefore, He introduced me his friend is incorrect. It should be He introduced me to his friend.
We prepared our friends dinner would sound correct when spoken, but in its written form, you need an apostrophe. The correct form, hence, is We prepared our friend �s dinner if you �re referring to one person, but We prepared our friends � dinner if you mean more than one friend (note the placement of the apostrophe).
She made us some breakfast is correct.
Have a great day or night, whichever applies! :)