I have pioneer avh 8700bt fitted. It has DAB but I don't use it for that, like Tommy I use tune in app if I want to listen to digital radio. I mainly use Spotify which is direct access on this head unit so you don't have to have your phone plugged in. I also use Waze and Google maps, they are always up to date. To fit this I bought all the below which is the harness, fascia kit, aerial adaptor and also the lead to keep the in car USB, although you can run the USB from the head unit into the glove box if you prefer.
https://www.dynamicsounds.co.uk/toyota-gt-86-car-stereo-double-din-fascia-wiring-loom-antenna-fitting-kit.html?gclid=Cj0KCQjwitPnBRCQARIsAA5n84lKw54sVcH5UYC-Z9YnZPL0kAhwu-GQGT1GkGqd_0voY9_FdQdmyhgaAj-IEALw_wcB
And, toyota gt86 2012 car stereo factory usb retention interface cable. £24.99 eBay.