Does anyone here know how to can vegetables and stuff?

I want to learn how to can. I have done some research but im wondering about reusing jars. I saved some Classico jars that say Atlas Mason on them. Can i use them or no? Also, do you have ot use fresh bought jars every time or can you reuse the specifically made for canning jars and just get new lids? Anyone with canning experience I'd love to learn from you . :)