Make-to-order scenário

Hello experts:

I am begining in SAP SCM and i am having problem to configure a make-to-order scenario to SNP.

The Material is configured in ECC to be a MTO material.

I CIFed the material, the plant and the customer to APO.

Now i have some questions.

1) How is the CIF of transactional data to run this scenario? What data do I have to send to APO?

2) How are the configuration in APO to material/location, ex. penaltyes, costs, etc.?

3) Will these customers have forecast, or the demand will be composed only with Sales Order?

Thanks Experts!