What kind of IT person? Depending on what you do, you can make from 1500 (if you are unlucky enough) to something like 10 000zl (good programmer for example).
How much it would cost you to buy a hose in Poland in an average neighborhood and how much would be your mortgage payments? What about a new or 1-2 year old car? How much for payments + insurance? How much does an average truck driver, teacher, nurse, engineer makes?
The "neighborhood thing" is almost non existent in most towns/cities in Poland. Sure, there are some areas you wouldn't want to visit/live or very rich ones, but besides that there is very little planning involved. Mostly it's a mix, where all live together. So you would rather need to check what's the condition of the particular building and maybe what time will you need to get to the city center in case of the big cities. The costs of buying are comparable to renting, a bit higher but still worth to do it if you earn enough. You would probably want to pay it off for something in between 15 and 30 years, as the payments are quite high. It's hard to say how much, cause prices are very different in each place.
The cars are pretty expensive, considering average wages, let's say the avg is something like 2000zl (depending on place and job), a new car would be like 40 000-70 000zl (nothing great), most people are buying used cars as they cost much less. Let's say you can get a few years old, comparable car for 15 000zl and many buy quite old, cheap ones for prices like 5000-10 000zl. Insurance also depends on the type and age of the car and your insurance history too. Be ready to pay something like 1500-2500zl a year.