Can we re-use the jars and lids, or do we need to buy new lids again?
If the jars you are using are the standard home canning jars like Ball or Kerr,
you can reuse them over and over each year. Be sure to run your finger around
the rim to be sure they didn't get a little chip. I store my jars with the
rings on them to help project the rims. You can reuse the rings as well, be
sure to check them carefully for any little spots of rust. If they have some
rust, use them to store your empty jars but don't use them with preserves.
Never, ever re-use lids. You can buy just replacement lids, as well as
replacement lids and rings at the usual places.