2, a laser pointer of course, and these guys: https://www.amazon.com/gp/product/B00797JCJW/ref=oh_aui_detailpage_o03_s01?ie=UTF8&psc=1

our bengal luuuuvs these. And this guy: https://www.amazon.com/Kong-Snake-Teaser-Pack-2/dp/B007B4WRM2/ref=sr_1_6?s=pet-supplies&ie=UTF8&qid=1481460428&sr=1-6&keywords=snake+cat+toy
He catches it, and drags it off by the neck lol. But really they'll play with anything. The point is to give him options so that he's busy.
3. A tall cat tree is a great idea, ours loves his, but really our main problem is that to get our attention (seriously it's why he does it), he likes to get behind the tv and fuck w/the wires, or get between my desktop monitors and the wall and do the same. We've tried putting obstacles there, but he finds a way.
So really, just know that they generally always need/want your attention. It would help if there's another pet tbh, we've even entertained getting a puppy cause I think a dog or another bengal, so I think if the dog is cool w/cats, that will be the catalyst to a peaceful home w/a bengal. Good luck though, they're a handful, but incredibly intelligent. Have Fun!