Change costs for valve shaft seals and piston rings

Hello, I’ve been looking on the internet and in the forum, but I don’t find anything about the question of how much it costs to change the valve shaft seals and the piston rings in a Toyota Auris 1.33 (99 hp) EZ 2017. Does anyone have experience with it or can they estimate the price? The parts themselves are relatively cheap, but the work should be expensive. What would such a thing cost roughly at Toyota or a free workshop? Dear greetings PS: I ask because I have a good offer available for a Auris, but in all probability, the two things would have to be replaced.