I just bought mine used as well about 2 weeks ago. I cleared the energy usage data from the previous owner, you may want to do that as well.
That being said, I have a question regarding the miles/kwh display in the center of the installment cluster.
Since taking ownership I've managed 4.7...
After putting close to 400,000 miles on 2 Prius, made the next step to energy responsibility. Picked up a used Leaf with 18k
miles, so far I really appreciate the quiet and serene experience.