Workshop costs at the Lexus Hybrid

Hello My father and I play with the idea of buying a used Lexus vehicle. I am a fan of new drives and would like to drive a hybrid. My dad unfortunately doesn’t play that way and draws the total cost as a decision criterion. Now I am sitting at the calculation of the total cost. I have almost all the necessary posts together for this purpose, only with the maintenance costs I am not quite sure how I can calculate them. With a new vehicle this doesn’t matter at the beginning because of a guarantee, but with a used car it is different! The full-bodied statements of the marketing department are of course only one side, what is real, is another, therefore my questions: The maintenance interval is the same with 15,000 km for all vehicles, or? How much does an average workshop stay cost and what is done there (what must be made specific?) Do I have to count for the hybrid technology with an hourly workshop rate, because other and additional technology? Which hybrid parts have the biggest wear and have to be exchanged after x years or x kilometers? I hope the few drivers can give me thanks.