Don't know what you mean by k-kozle, but there's a bus from Katowice Airport (which is not in or near Katowice to Katowice Station.
Edit Looking on the map, Kozle is the wrong side of Katowice, between Gliwice and Raciborz. There's probably a bus right from the airport to Gliwice - one of the posters here lives there and should be able to advise.
If not, get the bus into Katowice, and there's trains to Gliwice an Raciborz. Somebody from the christening should be able to give you a lift from there.
It won't be a difficult journey.
KK is a place near Gliwice, due west. I'm guessing that you are flying with WizzAir. In which case, there is a shuttlebus to the centre of Katowice, near EMPIK. From there, you can find ul Stawowa (Stawowa Street). It's right opposite and is the main street with McDonalds etc. It connects the bus station to the train station. The timetables are generally valid but check anyway.
If you have any specific questions, please don't hesitate to ask.