Hi and welcome!
I wouldnt jump from a punto straight into a tt, im pretty sure it will catch you out and dent the wallet badly.Either bending it or breaking something.
If you like the idea of owning a supra why dont you go for an n/a. Sure its slower and not as top trumps as a tt but it still looks great and saves a bit on your insurance. You could get used to the rwd,put your personal touches on it, and when your ready for the slap in the face performance get a conversion done by keron on this forum.
Make sure you get a good un mate, there are plenty of abused ones around.They are reliable big things, parts and advice are only a button click away on here so dont stress about that side of things.They are great cars and im sure you will love it if you get one.Good luck in whatever you choose to do.