Your pictures look distant so I can't really tell. But they look nice and better than the stock rims, though. You might need a hi-quality set of spacers to tuck out the rear rims and be safe. Quality spacer costs about $65/each. Don't settle for the cheap ones because they'll cause the wheel studs to break and you're in trouble. Is each tire sized 245/40/18?
The spacers that you mentioned seem like the ones that I currently use. They don't rely on the studs, but they they have the rings that sit perfectly on the spindle. If you want to tuck out 1", then install additional wheel studs on the spacers instead. So you won't have to hammer the stock studs out and reinstall the longer studs. There're not many longer wheel studs out there that can replace the stock studs. It took me a lot of researches to find out. I haven't gone into the Supra searches yet.
It's normal for the rear tires to always tuck in for most cars. I think 1" rear spacers will make your car look really good. You might need to roll or cut the inner fender edges. It's ok for a normal height, but if you lower it, then it's a must, especially if you carry more than 2 people.
Each spacer costs me $60. If you need to find the wheel studs, let me know because I can help you with some info. The brake system is removed because I'm working on a turbo project. I had to take out the entire under-the-engine crossmembers and the lower control arms.
