Answers are right on and I agree whole heartily.
I personally have had the Madagascar cage. It is a nice foot print due to the 24" x 24" dimensions. It is much larger and I'm sure sturdier so I personally feel the better value. It's a nice cage really, I housed my pair (their second cage) and then trio after introducing my single male to my girls. The only reason I do not still have the cage is because when I moved across country, I had to leave many things behind, and the cage was one of them.
The wheel, is a popular one, and safe.
As for toys, plastic army men or animals are sometimes liked by gliders. I'm not sure what you mean by twist ties, if plastic than okay. Other items many gliders like are plastic bracelets, they can be used to make toys as well. Plastic wiffle balls with holes in them also make fun toys. There are so many items, you will surely be finding stuff just about everywhere eventually for them, lol.
As for the coconut hide in photo, there are some things I have issues with as well. I recommend seeing about getting one made by Leela, they will be more safely made specifically for sugar gliders.
Also, Welcome to the forums if you haven't already been. I think it's great the way you are approaching this, the research is so important and it's smart to run by what you're considering prior to purchase, especially with the investment it is.
Make sure you have a vet that sees sugar gliders lined up so you have one if you need one, and check into emergency kits, they're great to have. Hopefully you won't need one, but you don't want to be in the position that you need an item and can't get it immediately. Some vendors sell them, others sell supplies you can purchase ala cart, or look through the list and pick up some things at the store each visit, to reduce initial cost.