Like most say, getting brand new gear would probably cost over or way over 1000$, however if you're looking to save up a buck or two - keep reading.

Get new boots, that's 150 - 250. Classic ones with laces are the cheapest and most durable. You can get even cheaper than that sometimes but you have to know what you are buying (i've got my current Nitro boots for 90 euros because they spent a few seasons in my friends shop). You don't necessarily need a new board, just look for a used soft rocker.

Look for a good brand but several years old, that's the cheapest option. https://www.amazon.com/Rome-Garage-Rocker-Snowboard-Mens/dp/B00N2J3RQU/ref=sr_1_11?ie=UTF8&qid=1502364473&sr=8-11&keywords=rocker+snowboard this for example is a super- cheap option, 150$ for a new board. You can get a good used board for 100$-200$, but then again you have to know what you are buying.

I destroy boards quite often so currently I have 2 Nitro boards, one of them was 100 euros used and the other one was 200 euros new. Of course in this price range usually you won't have a lot of choice.

When it comes to outwear/thermal layers/helmets/googles/gloves/socks - of course pants and jacket come first, as well as helmet and gloves, but then again you can get those cheap on ebay or amazon, just make sure pants and jacket have at least 5 or 8k in breathability and waterproof. Also get a long jacket - you will understand why later.

Are you planning to hire an instructor?