YOU SAID:

It cost an arm and Leg for this

INTO JAPANESE

それには腕と脚がかかる

BACK INTO ENGLISH

It takes an arm and a leg to do it

INTO JAPANESE

それを行うには腕と脚が必要です

BACK INTO ENGLISH

I need arms and legs to do it

INTO JAPANESE

私はそれを行うために腕と脚が必要です

BACK INTO ENGLISH

I need arms and legs to do it