Bog standard answer:
Good boots that fit well should be your first purchase. UPZ is a good boot and Dan Yoja (UPZBoots.com) is pretty good about helping folks fit remotely.
Good bindings are your second bet- if buying new (or used, for that matter) F2 Ti Race are the default standard these days, and Bomber, SG and PHK (Phiokka) are all good options.
For a board, look for something decent in the 162-168 ballpark as a first board. It need not be th newest and bestest, but something made after 2000 is a good bet. There are boards on here (including one I'm selling). Something like the F2 GTS would be a good bet. Forgiving, but you are not going to outgrow it any time soon. If you want to jump in with both feet, call Sean at Donek and he can help steer you towards a good beginner package that will last you.
Check out the regional forums and see if anyone rides places you want to ride to hook up.