Getting around in Torrance is relatively easy. The most practical option is renting a car, and there are plenty of car rental companies to choose from. Plus, public transportation is available options, including buses and trains, but these can be less convenient and more time-consuming.
Travel costs would generally depend on the number of days and distance traveled. Estimate about $100-200 for car rental and about $3-5 for single-ride fares on public transportation. Travel time for the day's activity should take about 6-8 hours per day.
With more time, consider exploring some of the neighboring cities near Torrance, like Long Beach or Huntington Beach. For a day trip, consider visiting Santa Monica or Venice Beach, taking advantage of the surfing lessons and bike rentals. If you're short on time, you can skip any of the locations that appeal to you the least but make sure to prioritize the top ones.