2) Brand New doesn't come in Pakistan
2) First of all 4x4 are not meant for top speed, but they have decent speeds on highway too.
4) Comfort is good not outstanding, it has good AC good seats only leaf springs cause bit problem but it is good offroader, a maintained 70 series with 1KZ will never disappoint you.
1KZ is one of best engine in its class, in 3L its good very torquey much powerful. Else if you want comfort you can get Pajero 1995-2000 4M40 is good engine. But remember nothing comes closer to Land Cruiser in Off Road.