Just looked at images of your car. If you have cross bars on your roof rack, you need nothing further.
Roll bar foam will slide right on. A bath towel makes good padding too.
Is your kayak a sit in, or sit on boat?
If it's a "sit in" kayak, load it hull up. If it's a "sit on", load it hull down. Two tie downs for short trips, bow and stern lines for longer trips. If you are good with knots, 3/8th nylon rope with truckers hitches will hold the boats. If not a knot person, cam buckles is plenty. No ratchet straps!!