If you two go out together, where would you like to go?
If you guys were to go out somewhere, where would you go?
ーIf you two go out together, where would you like to go?
「あなたたち２人で出かけるとしたら、どこに行きたい？」
go out で「出かける」
Where would you like to go? で「どこに行きたいですか？」
ーIf you guys were to go out somewhere, where would you go?
「あなたたちがどこかに出かけるとしたら、どこに行く？」
If you were to ... は「もしあなたが〜するとしたら」
ご参考まで！
カナダ 
