Hello Wheelers,
I have been driving a 2006 Toyota Premio - X - Base Trim (4x4 version) since last 2.5 years.
I live in Peshawar and make daily runs of almost 30 kms on heavily crowded roads 5 days a week. Some weekends call for motorway trips to Islamabad. It gives me 7.5 - 8 km/l with AC in city and 10~ish on long. (I am a lead foot, and drive quite enthusiastically above 125kph)
I have been contemplating a ride upgrade for sometime now, (I prefer JDMs), because mine has been giving me maintenance issues.
I have come across an offer that has gotten me in deep thoughts. A distant friend had imported a 1996 Toyota Surf (SSR-X 3.0D A/T) back in 2006 from Japan and has kept it for the past 12 years in pristine
condition; (seeing is believing). He drives a cultus for daily runs, and the surf is more like a showpiece at his home. He has offered my to buy it, should I be interested in doing so.
Now, this is a major paradigm shift for me, as I have never driven or kept an SUV before. Knowing that we can NOT compare a Premio with an Surf, I have some questions from the honorable experts here.
Can we call it an upgrade or a downgrade? As I will be moving 10 years in past (from 2006 premio to 1996 surf)
Is it bad or good to upgrade/shift from petrol to diesel?
Talking about the cabin of surf (in comparison to premio):
a) How is the legroom (both driver and rear)?
b) Is it noisy during drive or silent?
c) Does surf have easy to replace cabin air filter like premio?
d) Can a good sound system be installed without much alterations?
General advice from worthy seniors
He has asked me to inspect the car on this weekend i.e 5th of May, if I choose to say yes. Otherwise, he will sell it off to contending bidders 
Now, I am both excited and scared at this moment. Therefore, seeking prudent and honest advise.
Regards