do you have valid passport ?
if you have passport you need to apply visa for all countries en-route before you apply for by Road Travel NOC from Federal Interior Ministry - Govt of Pakistan.
you are late in your planning, by the time all paper work is sorted [ Oct end - Mid November ] it will be start of winters in Iran onwards.
@yamanshah - by chance you know Haji Kazim in Kohat?? he got such experience in a vehicle in 80s'