I realize this is an enormous question, worthy of books; I'd be equally interested in macroscopic views of the whole pair of continents and smaller-scale discussions of regional and local trade.
While you wait for an answer you might be interested in the "Pre-Columbian Trade and Contact" section of our FAQ on Native American History.
In particular, you may be interested in this answer by myself, /u/Mictlantecuhtli and /u/retarredroof, this answer by /u/Cozijo, and this answer by myself.