Welcome to All Things Plants Jodyredrose1,
Yes, you can re-use the soil.
Remove the soil from the old pot, dumping it into a pan (or you can use several layers of newspaper). Inspect the soil for any signs of insects. Some people go a little crazy and sterilize the old soil by using boiling water or baking the soil in an oven (stinky!!). Most folks just amend the old soil - mix the old soil with some new compost, slow-release fertilizer, or mix in a bit of new potting soil. Some people add things like bone meal, blood meal, dried manure, etc.
Growing one kind of plant all the time in the same soil will deplete the nutrients used by that type of plant which is why farmers usually rotate crops each year, so keep an eye on the nutrients. One the plants start to form small fruits you may want to add either some liquid fertilizer or slow-release fertilizer.
Hope this answers the question.
