Foreclosure and Rent to own are two completely different animals
Foreclosure is a bank own property that will have to be paid for prior to occupation.
Rent to own is... well paying rent with the understanding that someday you will own the property. The seller usually requires a large down payment and a higher percentage rate than a bank will require.
I'd be happy to help you if you could share some more information with me. Please feel free to email me with and we'll chat.