You won't find an EP91 Starlet in good condition for 1.2 Million. I really doubt even if a 2-door one would go for that price. However, considering the spares availability and relatively low maintenance compared with age, that would be a good option. You could also consider EP82 Starlet GT.
Correct me if I'm wrong, but isn't Honda Beat a 650 CC Keicar? DO u think that's a good idea? I have no idea about spares availability either.
Again, AE86 is a legend but anyone who has a well maintained specimen wouldn't really part with it for cheap.