0 the amount of money that you need to buy or do something -- 費用
1 If something must be done at all costs, it is very important that it is done. -- なんとしても
We have to succeed at all costs.
2 If something costs a particular amount of money, you have to pay that in order to buy or do it. -- (お金が)かかる
3 to cause someone to lose something valuable -- (犠牲、損失)を払わせる