St. Pete is a great example of a city where you might not need a car. It depends on how far you need to go, but there is a big "green" push in the area. This leads to a lot of people choosing to bike to work instead of driving. You will also see a lot of people skateboarding around, as this is also popular in the area. There is also a public bus that runs all over Pinellas County, and even runs into Tampa in some places. If you will frequently need to go into Tampa, you may want to rethink living in St. Petersburg, as this can become a hassle and may take a considerable amount of time.