A running vehicle is a hot commodity in that part of the world and with cheap labor they can fix just about anything. So why was that Mitsubishi not fixed and running? Why is every other car in Brazil a Ford? Why do you pretty much never see a Hilux in Russia (much to the consternation of the fanboys who think it would fit well in a rural country like that)?
Supply chain.
Toyota does not make seals. They do not make bearings. They do not forge and roll their own steel. They buy the same parts everyone else in the business does. Toyota was the only major brand to pay the poor equatorial nations any attention for a long time. They were the only ones who did the hard work to establish the business relationships needed to get their service parts into the poor parts of the world. As a result of this their vehicles are the preference of the poor parts of the world, because they are the ones you can actually get the parts for.