You really don't want Cool Whip...nothing but transfats in that stuff and it's not even a real dairy product!
Real whipped cream is allowed, but only a few ounces a day on induction. Sugar free Jello has Aspartame in it which should be avoided when at all possible. On the other hand, Jolly Rancher does make a sugar free jello that is sweetened with Splenda instead of Aspartame (a much better choice). I have to agree with AgonyCat, though. If you can make it through induction without them, you will be better off, but if it's either that or something with real sugar in it, go for the low carb choice.