1) Is this a comfortable enough salary to live in Pila and do a bit of sight seeing every couple of months ?
Yep. You'll have no problems living comfortably on that as long as you avoid the Unholy Trinity: Alcohol, Tobacco and Girls. Live clean and you'll live well.
I feel that for the experience I have, I am getting underpaid.
At $37,000 US a year, that's less than half of what you would make in the States or in a richer country, but about the best you can expect for Poland unless you have senior management or administration experience.
How is Pila as a place? Very tough to find information on the internet about it.
There's no point in making this sound good, but I believe the first word that would enter anyone's head when they hear "Piła" is "boring", followed by "dull", "dull" and more "dull". It's a small, subprovincial outpost in the middle of nowhere with little going for it. Not the worst place in Poland, but not in the top or second tier. Just boringly average, and as remote as you can possibly get in western Poland.
Biggest challenge you will face is that you will have to travel two hours to Poznań for anything resembling culture.
Biggest advantage is that the cost of living is lower than in the big popular cities, so your money will go further.
One word of advice: travel mostly in Eastern Europe, and avoid the very costly West, ESPECIALLY London and Paris, which are just outrageously expensive. There are lots of cool places to see in the Eastern European countries, including in Poland. You could spend two comfortable weeks in any of them for the same money you would spend on a frugal weekend in London or Paris.