how do you load your bike on the car?

[Pedal Wench]

what size bikes you have? do you need to lower the seat in order to fit them in inside?

Mine is a 51, BF's is a 55cm, with lots of seatpost. In the RAV4, the back seats are folded down. In the PT Cruiser, he takes out the back seats - doesn't need them so they stay out permanently. By putting the forks towards the back of the car, there's more room for the seatposts where cars typically have more headroom.

Edit: I've also fit in two bikes with aerobars. I put the bar in at an angle, so the forks are at about a 45 degree angle. The bikes can be turned so they still fit lengthwise and the aerobars clear the rear window.