Hyundai i20 or VW Polo as first car?

Hello together, because I need my own car because of my training from September, I look for recommendations for this. Dangers are mostly rural road and highway. In the city I drive only to get out and in. Splitting is about 50% rural road, 40% highway and 10% city. The car should create at least 3.5 years resp. 75.000Km without as big problems as possible! Since I do sometimes longer highway rides, I do not want a car under 90 HP. By searching I have the Hyundai i20 1.4 (101hp petrol) Ez 2015 and VW Polo 1.4 (90hp, *diesel*) Ez 2015 found, where I like the Hyundai i20 with the 101hp variant very much. Now the question is, how many kilometers of Koreans creates so and how reliable is it? Can I buy the car with about 80.000Km used by the dealer without having to worry about any defects? Or do you advise me from the car/construction year?! As an apprentice I don’t have the money to pay for every month repairs! he first car can recommend up to 850€, I am very grateful! Stay healthy!