I was in your shoes (or boots) a year ago and could probably chime in. I am 5'9 and 220lbs.
I went through a few sets of stuff, but here is what I can suggest.
Boots
Buy brand new boots, buy all . Have them fitted to your feet at a boot fitter.
Bindings
Get TD3 or TD3 SI from the start. The bail stops alone are worth it over the TD2. Go here first, don't buy any others, you will regret it.
Board
Get a shorter board to start with a large sidecut. I went for a 4WD 179 (10.5) and it was hard to handle while I was getting the hang of things. Shorter would have been better. I was able to demo a few boards from Prior and once I rode the FLC metal, the 4WD was up for sale and I ordered a metal Coiler. The metal was so much easier to ride and felt longer than it actually was due to the larger sidecut.
So after my 1.5 years of buying and selling gear, this is what I ended up with.
UPZ RC10
TD3 SI with Fintec heels
Coiler AMT VSR 168 11.5m 21.5" waist