Toyota long-life coolant is good, but I have been using pre-diluted aisin (there are two types of coolants pre-diluted and concentrated - prediluted coolants are plain and simple just buy them and top your car up with them, whereas concentrates need to be diluted with one half distilled water i.e. 500ml coolant, 500 ml distilled water) Also know that you can never mix orange dexcool coolants with green ones ever! The aisin im using is the green one and i am satisfied. 1 liter bottle costs around 500 and I had to buy 4 for my city. Using suzuki coolant in my alto and altis already came with coolant out of the factory.
Dont go for nasa, guard, master, osaka.
Go for fuchs, aisin, caltex, toyota llc.