Cool! Finland! One of my favourite places! 
Are you going into the countryside?
Money? Do what I did when I went to Finland in 2000: use ATMs. Insta-conversion! If your card is on the Plus or Cirrus system, it should work. Just to be safe, I got some Finnish marks (this was pre-euro) at a currency exchange booth in downtown Toronto before I left. I was surprised that they had Finnmarks; it’ll be easier for you because everyone has euros these days.
When I got to Vantaa airport outside Helsinki, I cleared customs and immigration and just walked out the front and there were buses into town. It was much smaller and nicer than the Toronto airport, even the new terminal. Mind, I had to change planes at Schiphol in Amsterdam on the way there; I was traveling KLM. That involved a bit of trudging, but mercifully no customs inspection between planes. Customs was in Helsinki.
Finland bears a startling resemblance to the Shield country in central Ontario: the rocks, the trees, the lakes. I was quite surprised. There were landforms that were completely familiar, but with other stuff on them: a Russian Orthodox cathedral instead of a McMansion, for example.
The country is bilingual Finnish and Swedish; there’s a small Swedish minority, around 10 %. Lots of people speak English.
There are freeways and apartments in the Helsinki area, but on a much smaller scale than, say, Toronto or New York. Helsinki has few buildings over 15 storeys tall, and a rather unique style of modern architecture involving midrises along the main streets. Check out the Stockmanns department store and the train station. Older areas near Senaatentori were built by Russian merchants and are different again.
Helsinki has a metro system hollowed into tunnels in the granite. The station platforms are huge, and the rough shape of the granite tunnel looms overhead like an effect in a 1960s Bond movie.
November… you might be into the first of the show, generalizing from the climate here in central Ontario, but that’s not certain. If there is no snow, there will probably be cold rain and/or ice around the freezing point. These are the worst conditions for travel. Helsinki is actually near the 60th parallel, so there will be a big difference in day length compared to New York. We’re past the equinox, so the days will be shorter.
Ride the trams. Visit the Sibelius monument. Check out Suomenlinnea, which is a sea fortress built by the Swedish against the Russians a few hundred years ago. You take a ferry to get there. Go to a sauna. (There’s a whole sauna culture in Finland. Every house has one. You will encounter the word loyly, which is mostly untranslatable, but has to do with the aesthetic qualities of being saunaed. I think. I’m not completely certain.)
All in all, Finland looks like Canada run by smarter people. 