[extinguisher]

Hi all, this is my first post, best regards! English is not my native language so do not get offended if I misspel something, thnx!
So, yesterday I bought i30, 2018, 1.4 mpi, 73 kw with 145000 km. Seller recently changed the clutch (much of city driving), spark plugs and car battery, nothing else was changed except regular  changes of motor oil, filters and disk plates. MY question is, when to change serpentine belt and accompanying parts (by the visual inspection belt looks good to me), water pump, gearbox oil, fuel filter (is it liftime?)? Regarding the timing chain i saw that is "liftime" but other informations say that after 200000 km it colud be for replacment, so what experiences you have?
Fell free to add sometnig if I forgat.
I plan to change oil, filetrs, spark plugs and battery by myself, are there any complications (as a kind of reset that requires a special device) in any of them?

[BrendanP]

I have attached a service schedule for my Hyundai, maybe if you ask your local Hyundai service centre they will give you one for the later PD variant, but I think the replacement intervals for items like air filter, spark plugs, fuel filter, gearbox oil, coolant will be similar. This is for UK so intervals are in miles, just multiply by 1.6 for km. There is a recommended engine oil and filter change at 10,000 mile/12-month interval which I have always done myself. If the correct oil is used and changed regularly, the timing chain should not need replacement, my old diesel i30 reached 500,000 km without problems. You have to trust the previous owners of your car have changed the oil regularly, maybe you could ask an experienced mechanic to listen to the engine and detect if the chain sounds loose or worn.

My car is nearly 10 years old and 190,000 km and I haven't changed the serpentine belt yet, but I check it for cracks and wear regularly. It is quite easy to change and not expensive. Wikipedia says it should last for 160,000 km.

[extinguisher]

Found information on serpentine belt, first inspection after 120000 km or ten years, after that inspection every 30000 km.