Basic phrases:
Yes – Tak
No – Nie /neh/
Thank you – Dziękuję /dzhenkooyeh/
Good morning, good afternoon – Dzień dobry /dzehn dobri/
Good evening – Dobry wieczór /dobri vyechoor/
Hello – Cześć /cheshch/
How are you? - Jak się masz? /yak sieh mash/
I'm looking for ... - Szukam ... /shookahm/
I think the pronunciation's ok. It looks scary but in fact it's quite easy ^^
And
here you can find some words and useful phrases with their mp3 version.
Powodzenia!