you don't know anything about the price of property in Katowice
Nope, don't need to know it.
But a quick google and hey presto I can find out ;)
1.5km from the train tracks
That's good, you'll be fine then. You're obviously up towards the Muchowiec end. Nicer up there, you'll be close to the park and the private airport....that's not very noisy though, only a handful of smaller planes and helicopters come in and out of it every day. Beside 3-stawy park and shopping centre too.
I just wanted to know some practical things such as the other costs I might expect when buying and where to find a reputable person to inspect the property.
And IMO the best thing you could do would be to hire a lawyer who specialises in property and you'd be steered in the right direction. Lawyers are ten a penny in Katowice and they don't charge much. They'd also be able to get you a surveyor since that's the game they're involved in.
I know it's an extra charge, but from bitter experience it's far better in the long run to hire professionals to do the dirty work than try going about it yourself. People see foreigners coming to buy property here and all they see is dollar signs y'know. The reason I'm recommending a lawyer is because they'll be able to sort out any tax issues too. Ya never know they might be able to save you a bit on it.
Best of luck.