"I bought pencils and pens."

Translation: 鉛筆とペンを買いました。

[ahANpg]

鉛筆とペンを買いました

[RayyanSheh1]

エンピツとペンをかいました。

Enpitsu to pen wo kai mashita.

[Kantoros1]

could you also say えんぴつもペンも買いました?

[Dylan_Nicholson]

Could 複数の be used to specifically clarify you did buy more than one pen & pencil? Google translate seems to think so, but it's hard to get a sense of whether it's an everyday conversational sort of term.