Can you use old greeting cards in your paper craft?

That will depend on your own art imagination,certainly no one elses

Anyone in Toronto like to have my collection of used greeting cards for paper craft?

There's tons of ideas for using old cards. There's even as book out there somewhere with a variety of things to make. If nothing else, you can always make laminated bookmarks.

It would be fun to use the old greeting cards as decor around your home!

You can make little origami boxes.

ABSOLUTELY!!! There are many things you ca

n do with old Christmas cards. One idea is to make a collage with some of them and use that in a nice frame -- even one you mlake and display it every year. You can change out the cards as well for variety. You can cover them with clear contact paper to make Christmas coasters or larger for placemats or even a table runner. These are just a few ideas.