Bike racks for your car are essential unless you never drive them anywhere or unless you have a cargo space big enough but those you mention probably cost more than the bikes you're considering.

All newcomers don't want to spend too much money before they find out if they're going to like cycling long term. You don't have to spend a lot of money on new bikes but it's really easy to throw away too much on old bikes that you'll never be happy with - so proceed with caution.