Really don't want to throw cold water on your excitement, but really for a beginner (and frankly many, intermediate riders) the gear is pretty much irrelevant. TBT and other technologies are particularly irrelevant for first-time riders. Bindings even less so - a roll of duct tape would work.
The general advice is to rent or get whatever you can find in you size second-hand and invest the savings in lessons.
Also, it is entirely possible that as you become more experienced and progress in your riding that your focus/style changes - you might discover that you prefer big mountain/backcountry riding over park, etc.
Again, I do not want to come across as discouraging (cool that you are getting into snowboarding!), but gear should be one of your last considerations.
One exception to the above: Get well fitting boots! From a store (preferably a proper board/ski store), not from a mass retailer let alone online. Proper fitting boots are hands down the single most important piece of equipment that you can get. Next are padding and safety gear plus a decent jacket and pair of pants (you might have something usable from your skiing days already).
Everything else can come (much) later.
here in ontario you can only discover that you prefer big mountain/backcountry riding through process of elimination of everything you get in to ride in Ontario
that said the advice above is the truth, your priorites are:
4) any board or bindings that are cheap, doesn't matter at first
if you go regularly you can certainly expect by the end of your first season to be playing around on small park features, my 10 year old was out weekends and holidays last year, her first season, and she was hitting small features by end of year, little rails and baby jumps and so on
If you think that park is where you want to go get a used board that is park oriented, ride it everywhere on the hill, but don't be afraid to get something all round and ride it everywhere including the park.