These aren't your things, so you can't touch them.
You shouldn't touch them until you pay for them.
ーThese aren't your things, so you can't touch them.
「これらのものはあなたのものじゃないから触ったらダメだよ」
your things で「あなたのもの」
can't touch them で「それらを触ってはいけない」
ーYou shouldn't touch them until you pay for them.
「お金を払うまでこれらのものを触ったらいけないよ」
until you pay for ... で「…のお金を払うまで」
ご参考まで!