The word он is a personal pronoun that declines like this:

The «н» versions of the pronoun occur when the pronoun is the object of a preposition.

Он refers to masculine singular nouns, which can be either people or things, so sometimes it is translated as he/him, and sometimes it is translated as it. In other words, if you are refering to a врач doctor, then the sentence must be translated with he/him, and if you are refering to a грузовик truck, the same sentence must be translated with it:

In casual conversation it's common in America to say things like “Me and John went to the store,” especially when we are children. Schoolteachers then try to beat us out of that habit and make us say “He and I went to the store.” Because of that influence, English speakers may be tempted to say things like «Он и я ездили в магазин» in Russian. While theoretically one can say that in Russian, no one ever does. Instead it gets rephrased as “we with him” «мы с ним». Of course, it would be ridiculous to translate that as “we with him” in English; you still want “he and I” or just plain old ‘we.’