I'm sure you get the idea from what has been posted already, but in case you didn't....there is only one way. This would be the right way. Take your time and do it correctly (if you know how) and if it's your first time, or if you happen to run into from problems then it will take a maximum of one hour from saying "Ok, let's do this" to putting away your tools.
Know that one hour is more than enough time, but like I said, you may run into problems. The other thing that you should know is that no shortcuts should be taken because...
no matter what the emergency is, there is never any need to rush a brake job. Either you drive the Supra like that if you need to get going and if the brakes are too worn out, then don't even take it.
Maybe you're asking this question because you don't know how to change brakes, if so, then that's completely different.