I got into canning a few years ago and it has saved my family a ton of money and the best part is we get to eat fresh in seasoned vegetables and fruits year round.
Tomatoes are a big one in our home as we love pasta sauces etc.
You will need: large canning kettle or stockpot, mall, round rack, 6 quart jars, sterilized box of new lids and rings.
If you are new to canning you can find some good deals on equipment here.
This gives you the example of how to make canned Roma tomatoes, one of my favorites by far.
How To Can Tomatoes, Read Tutorial