Costa Rica has safe and transportable roads in 90% of the country. This means traveling around this country would not be a problem. Most of the citizens have their own transportation method, but the government offers plenty of options for those who don’t have their own.
Public bus: the country has buses for short and long distances, these is probably the cheapest mean of transportation. The price range goes 0.65 to 18 dollars depending on your final destination. Costa Rica counts with many bus stops al around the country.
Taxi: the taxis in Costa Rica are color red, this taxis charge with a general fare, for example the price a taxi will charge you for a trip from SJO Airport to Jacó Beach goes around 100 to 115 dollars. You will be able to find them all around the country or even call to the closest taxi station. Uber, didi, and indriver are apps for transportation to, all of these charge with different fares that vary depending on your destination. Sometimes this apps don’t count with enough drivers in places far away from the capital.
Another option that people use are pirate cabs, normally someone you know gives you the contact or you can find some of them in social media.
Rent a Car: this method can be the most confortable way of traveling, prices vary a lot, depending in where you rent the car, what type of car is it, how much time you rent it and others, but it is defiantly worth it. A quick tip, if you are planning on visiting places like mountains, rainforests, waterfalls and far away beaches, the best thing to do is to rent a 4X2 car or even better, a 4X4 car. This will help you have a more secure and easier trip.
Domestic Flights: Nature Air used to be a a domestic flight airline that offered many destinations, but it was shut down a couple of years ago. Most of the touristic places in Costa Rica are perfectly adapted to arrive by land, but still there are a couple of destinations in which traveling by air would make sense.