Yes, you can add totals bets to parlays, which is a common practice. When allowed, betting a same game parlay of both a team to win and a total can be a fun way to add enjoyment to watching a sporting event and make a bet that may have an advantageous correlation. Totals as part of same-game parlays may not always be allowed. Still, you will generally be able to parlay a totals bet from one game with any other totals, money line, or spread bet from another game or a futures/prop.