Baku has a well-arranged local and international transportation means. The International airport, the National railway station, and The International bus terminal are modernly organized and tourist-friendly, with convenient links to the rest of the public transportation of the city and the rest of Azerbaijan.
It would be wise to check out the routes of the metro, the buses, trams, and trolleys in advance and prepare some kind of path which matches your needs.
If you are a decent driver and you plan to visit destinations around the city or you simply want a higher level of independence, you might consider renting a private car to use during your visit.