So they don’t have anything to defend against even like Scuds?
There's 2K12, SA2, ships defend with lighter missiles, the problem is that all Polish SAMs are either medium or short ranged and many of those are older slower models which makes interception difficult, one way or the other we would have to buy Patriots, now we we have them for free.
Also these other systems are used to protect troops, they're tactical defense systems so yes we could defend against scuds but we were defensless against more modern ballistic missiles.
Any missile cruisers, aircraft carriers or nuke subs?
Aircraft carriers or cruisers on Baltic? You get across that sea in something like 2 days.
Currently Polish navy constitutes 2 Oliver Hazard frigates, 4 corvettes, 3 fast attack rocket ships, 4 attack submarines, 18 de-mining ships, 5 landing ships,1 logistic support ship and about 50 smaller support vessels. Subs are not nuclear, not even Germany uses nuclear subs, its not worth it on such a small and shallow sea.
Is Polish military service volunteer or compulsory?
It was compulsory till this year, like i said we're undergoing huge modernisation which includes the armed forces going completely professional effective from this year onwards.