Law / Visa for Work in Poland [29]

Hi gbharatk, hi brownMan
I just got my work permit to Poland, and myself I have to prepare visa appilcation. I will appreciate your help to advice me on this :

- Is a return travel ticket really needed ?
- Should medical travel insurance cover all period (let's say visa for 1 year), or just the first days before the compagny insurance take effect ?
- I hope you were succeful with the visa, how long it took to process it (even if I'm applying from Czech Republic so maybe there some difference) ?

Thanks in advance,
Best regards,
Fonfon