Sur le Facebook de Romain. ("du" means "of the" since we don't use "de le" and "de la" is for the feminine. In any case, you're probably not trying to talk about a Roman from Rome ;P)

(On peut y trouver/On y trouve) ses informations, par exemple sa date de naissance, son université et sa liste d'amis (use d'  to link with a vowel or H since it's mute in French anyway)

Il est journaliste et son prochain article parlera (future) d’amitié. Sur son Mur Facebook, il a demandé des idées pour l'article et ses amis lui en ont donné (lui ont donné des idées, but you'd use "en" for that previously mentioned amount or number of something to avoid redundancy just as you would with a pronoun)