If you own 5.7L Land Cruiser, then its OK. What fuel efficiency can be expected from 5.7L engine? They are not designed to be fuel efficient
Thank you very much for the appreciation. Well, if you can easily manage and afford Toyota Prius C (Aqua) 1.5L, and now even Vitz 1.5L Hybrid (2017-and above), then I would personally recommend to go for 1.5L car, preferably Hybrid Vitz 1.5L (1.5L car is more fun to drive than 1.0L car, but in city drive, you cannot go more than 60-80 kmph, so, both are equal).
If going for used JDM, then Self-import one and it must be at least 4.5 auction Grade. Otherwise, 2015-2016 or above models Vitz and Passo (especially 3rd generation Passo, with Moda Package) are also excellent options, however, may feel under-powered sometimes.