Select herbs can grow extraordinary well indoors or outdoors, in containers or the ground, it all boils down to what you want to do. If the space receives less than five hours of sunlight in a day, you might be better off going indoors for easier accessibility especially for watering and cooking. Besides, this helps prevent weeds, pests or fluctuating temperatures.
Seeds are quite cheap, but take longer and require more resources to grow. While on the other hand, seedlings are faster to grow, but only available in spring and summer.
Several gardening tools are essential, may be a spade, gloves, pots, containers, virtually anything you need for the job. And remember, some fertilized soil is important too, this can be naturally generated, or a general-purpose compost solution from a gardening store. For container gardening, a packaged potting soil mix can go a long way, as you will have little, to no worry about pests.