Tourists only have to present their baggage to customs officials upon request, which rarely ever happens. The Costa Rican monetary unit is the Colon. It is best to bring money in the form of U.S. dollar denominated traveler's checks, don't expect to cash personal checks. Many English-speaking doctors and dentists practice in San Jose. Pure and suitable for drinking throughout most of the country.
Bus service is readily available both inter and intra city as well as internationally.
Two domestic airlines service the country well and there are a number of air taxi services as well as helicopters. The road system is somewhat primitive compared to North American standards, and driving at night is not recommended. An international driver's permit is not necessary. The tone here is casual wear - it is not necessary to dress up to go to the theater or to dinner. Comfortable lightweight is best.