If the injectors were leaking, I would think you would smell gas. It would be more that likely due to the coolant temp sensor giving a lower than normal reading, thus causing the injectors to dump more fuel into the cylinders than necessary at start up.
I am more in line to think that it is one or more bad valve guides/seals. And it cannot be too bad if you aren't consuming any oil. I'd forgo the dealership changes even with the good eye candy there and buy myself a good high mileage oil such as Mobil Super, Valvoline Maxlife, or Pennzoil High Mileage and change the oil myself. Give the new oil about 1500 km to see if the blue smoke has ceased. If so, then keep using the oil. If not, then a top end rebuild is more than likely in your future.
The previous owner of my 4runner ran the dealer bulk dino oil for six to seven thousand miles up to 70,000 miles.