Virtually all large cities and towns offer some form of public transport such as buses and taxis which means going around in Finland is not a problem.
Info about almost all kinds of public transport in Finland which includes airlines, airports in Finland, bus routes, driving maps and trains in Finland are available at this website.
The tables underneath will cover additional information regarding the travel methods to get around Finland: Travel by rail, travel by air, and travel by bus and car.
Airports in Finland
Public Transport in Finland
Finn Public Transport Questions