[mrlmd1]

How many miles are on the bike and why do you think the chain and both sprockets need replacing?
Has the chain been cleaned and properly oiled? Did you measure it to see it has stretched beyond it's recommended length? Surface rust, if it has been dry, is not necessarily a reason to replace a chain. If the sprockets are not worn, they don't have to be replaced either. Have someone who knows something about bikes look at it first, you may be wasting your time and your money.