"Best" is a subjective term.
Anyhow; the most highly sought after Toyota in the world is:
Toyota Supra
Supra needs no introduction. And if you don't know about Supra then you really shouldn't be here.
Unmodified otherwise known as "unriced" Supras with low mileage can cost as much as $75,000 in U.S which is insane because Toyotas depreciate rather quickly in Western Markets.
To put things into perspective, you can get a Ferrari 360 for that much!
P.S People pointing at Priuses, Crowns, Camrys and Aquas are either joking or know absolutely nothing about cars!
A certain brand's best selling car doesn't make that particular car the 'best' the brand has to offer! Educate yourselves, people.

Good Day!