Ans #1: Buy a restored/running forty. Ideally pre 2010 registered. If you get an unregistered vehicle from auction, it will set you back at least 300K in registration, if you are not a Income tax filer. In case you are a filer it will still be around 100K.
Restoration of a completely disable FJ will cost you a lot more than buying a one is acceptable running condition. From there you can start off and improve it as you like and when ever you wish to start off....
Ans #2: I guess answered above
ANS #3: I live in Lahore so can't answer that.
FJ is a good starting point as it is simple to work on and parts new and second hand(kabli) are easy to find..you can learn to work on it and drive it...