You know, that the primary measure of tire wear is the tread depth (TWI indicator). However, in the case of low mileage, does the age of the tires have any influence on its quality??
Probably not, though you can accept, that e.g.. An eight-year-old tire may already show some signs of aging, which is influenced by the operating conditions. The user of such tires should therefore check their condition on their own. With the richness of the current commercial offer on our market, it turns out to be time, that a brand new tire is stored in warehouses for up to two years or longer. However, this does not reduce the quality of the product and is not reflected in the warranty, provided by the manufacturer.

Do you confirm the opinion, that the requirement of wheel balancing is correct 10 thousand. km?
So, and in Polish conditions it should even be done more often. Overcoming holes, which are present on our roads as well as high curbs and protruding tram rails or manholes may cause the tire to move against the rim or dent the rim, not to mention serious damage. This entails an immediate unbalance of the wheel, harmful while driving, both for the tires and the entire vehicle.

Some time ago, there was controversy over how to mount directional tires.
The recommendations are clear here: they must be mounted in the direction of travel, indicated by the arrows on the sides of the tire.

Was it recommended to change the wheels sometime (exchange) still makes sense?
Basically there is no such need, at most one can consider moving the wheels off the driven axle, which inevitably the tires wear faster, to non-driven. On the other hand, however, most cars today are front-wheel drive, it follows from the conditions of maintaining safety, that the condition of the rear axle tires is more important here, which puts the sense of such an operation into question.

What do you think about the use of used tires?, e.g. imported from abroad and cheaper than brand new tires?
The guiding principle of using tires is not to use tires, whose history is unknown. The savings made at the time of purchasing a tire of unknown origin may turn out to be apparent, because her life is likely to be short. Meanwhile, the possibility of buying new tires in installments is becoming more and more frequent, which allows you to spread the incurred expenses over time without detriment to driving safety. A tire from an unreliable source can fail unexpectedly, which will have dire consequences.