Yes, there is a possibility of dealer installed AC though KIA. Ask your local parts manager about it:)
remove the big plastic skid plate and it's right there , the filters there but under a fuel line.
If the bulbs have been replaced as well as the fuses then there could only be one reason for the issue. This is the relay between the switch and the fuse box is blown.
Not sure what a rotor screw is. More info please.A picture is worth a thousand words. I believe those screws are 6mm 1.0
Depends on what you are trying to drain ... please be more specific on which fluid needs to be removed.