Polsat channels like TVP 1 and 2
actually Polsat and TVP 1/2 are two different broadcasters
eastern Germany (close to the border) - you can probably receive terrestrial signal from Poland (TVP 1, TVP 2; Polsat; TVN)
if you want a dish + decoder - you can buy one in Poland, but you should have a Polish address (they don't want to sell abroad, because, I guess, it's some kind of written or unwritten agreement, between braodcasters)
if you already have a dish, there are no special Polish satellites, our 3 "digital platfoms" (Polsat Cyfrowy, Canal+, n) use either Hotbird 6 (13 degrees East) or Astra (I don't the parameters)
The problem is that there are very few free-to-air channels, most are crypted, so you have to subscribe (without Polish address may be difficult)