Spacio is the better Probox right?
I personaly think, Wish lies in the MUV category rather then a Station wagon as a Corolla Feilder mainly because of the third seating row.
In Singapore yes ive seen many but as commercial cars only. Im not sure about its review or how would it do in Pakistan. But yes its a great looking car.
Make sure you do your homework before the purchase 
As a toyota most parts would be readily avalible others would come with time, or else imported over night, Dubai, Malaysia, Taiwan, Thailand etc. So they shouldnt be a issue 