My big brother used to hit my little sister and take her toys from here, which made her cry.
自分の兄と妹のことを言っているのであれば、次のような言い方ができますよ。
ーMy big brother used to hit my little sister and take her toys from here, which made her cry.
「兄は、よく妹を叩いたり、妹からおもちゃを取って泣かせた」
to hit someone「人を叩く」
to take one's toys from ...「…からおもちゃを取る」
ご参考まで!