Fencing is the most effective method to keep rabbits away from plants. There is information on dealing with nuisance wildlife in this publication. https://extension.umd.edu//sites/extension.umd.edu/files/_images/programs/hgic/Publications/HG90%20D...
Pull out tomato and pepper plants when the first frost comes, or anytime before then if you feel like the plants are no longer producing well. Any tomatoes that have started to develop color can be brought inside to finish ripening (on a counter, unrefrigerated).
Are you looking for information on soil for a vegetable garden? You can use existing ground soil with compost mixed in. The key to soil improvement is the continuous addition of organic matter (compost). Do a soil test to find out your soil pH, nutrient levels, and organic matter content. Here is a link to our web page about soil testing and how to submit a sample. For a vegetable garden, we also recommend testing for lead. The University of Delaware includes lead testing in its basic soil test.