For bread crumbs, just use stale bread (french or italian work best)and break it into chunks and put it in the food processor for a few pulses. For long term storage just put it into a ziplock bag and stick in the freezer.
For croutons, again use stale bread, french or italian, cut it into 1/2 inch cubes. I usually like garlicky croutons, so I heat some butter & olive oil with maybe four whole garlic peices (not heads) over low heat. Pick out the garlic, toss the bread cubes with and spread onto a cookie sheet season with a little salt and put into a 350 degree oven for 20-30 minutes, just keep an eye on it stir them around every 5 minutes. When they come out of the oven they should be brown & crispy. Sprinkle with parmesan cheese while still warm.