The AE111 has twin pots up front, they bolt straight onto a Starlet and have slightly bigger disks. ST185 Celica GT4 2-pots fit under 15's, but only just, and you will need brackets made to fit. The ST205 GT-4 disks are quite large, and the calipers will need 16's as they're chunky 4-pots.
I'm currently running 3G 10 groove disks and Mintex 1144 pads on the front, stock pads and disks on the rear, plus DOT5.1 fluid and some of Mr Burwash's braided lines. Suited me fine on the couple of short outings I had on track.
If I were keeping the car, I'd be opting for some 280mm(ish) stock flat disks with suitable calipers from a larger Toyota (Gen7 Celica vvti 190 fits the bill I think), using Mintex 1144 pads. I wouldn't bother with drilled or slotted disks.