I have done it from the SIM to the phone (there is a short cut in Phonebook --> Options --> multiple to) also went well on Mobile phone tools, mi problem is that when I copy from SIM to phone, the contacts apear as SIM contacts and they can not be edited as Phone contacts.
I have a Lincoln LS with bluetooth, and here's how it works on mine. I can't actually transfer the phonebook in the V710 to the car bluetooth unit, but I can access the phonebook in the V710 through my car's bluetooth control. When I press the button on my dashboard that normally prompts my car bluetooth voice, instead of releasing the button, I hold it down for 3 seconds or more. That bypasses the car bluetooth voice system and sends me straight to the voice system and phonebook on my V710. According to the instructions that came with my car bluetooth unit, that's how it's supposed to work with any bluetooth phone. I assume that the Lexus bluetooth system works the same way, but I don't know. Hope this helps.
I have a 04 Acura TL with Bluetooth. Unfortunately, you can't transfer the phonebook to the car's HandsFreeLink system. I don't even think you can bypass the car's phonebook like in the TL (Although I will be investigating this as that is an nice feature) As far as I know they have to be enterred manually, I only enterred the numbers that I use the most often.
Hopefully, you can do it automatically with the Lexus, but I haven't heard of them automating that transfer yet.