I would definitely ask about a service contract, I bought one for my IS300h & they gave me a discount, plus you know exactly what your service cost are going to be over the next 3 years, so well worth it.
I turned down Supaguard, gap insurance etc.
I would ask if you can get the winter pack added for a reasonable price, well worth it in my opinion, rubber mats, boot liner, mud flaps & bumper protector.