Kybella a week ago. Just wondering if it was normal to be very red the first few days and then scab up after? (Photos)

certainly redness swelling and inflammation are all normal after a Kybella treatment as these are signs of inflammation. Typically scabbing is not normal. I would consider applying Bacitracin to the area but based on the pictures you should be fine. Persistent or worsening redness, swelling or fever or not normal and requires evaluation by your physicians. 

Kybella injected into submental fat is a great treatment for fat reduction. Some patients require more than one session depending on the amount of fat to be destroyed, but results can be appreciated right after the first session. It is normal for some patients to experience redness, swelling for few days. In your case you need to follow up with the physician that performed the injections.
In my practice immediately after injections we apply a very cold gel for 10 minutes and recommend using cold compresses at home to minimize the redness and swelling.