If I got a Form 1095-C instead of 1095-A, where do I add it to?

Form 1095-C is informational only and doesn’t have to be reported. 

Then the section where they ask about a 1095-A I just leave it blank, right?

Yes, if you did not receive a 1095-A form, there is nothing that needs to be entered in that section of TurboTax.  So you would answer the question in the beginning of that section with "No, I didn't receive Form 1095-A." and then continue from there.