Go for Uniqure UD70 it's a better option although all China's are same but reviews suggest that UD is a bit better. Easily available near Motorcycle Plaza, Murree Road
No need, learn on your own bike, riding bicycle means you have some idea about balance, you will learn quicker
Wirelocks on both tyres should be fine if you want to low cost solution
You will need a motorcylce license, if you know how to drive a car than it is better to get Motorcycle/Motorcar one, would be useful later on in case of car
I would suggest get it Rwp registered cuz token is lifetime, i think you have to pay yearly token tax for isld registration (not sure). The dealer from which you will buy will most probably suggest he would get it done for you, obviously it would be expensive as has to earn profit on that too.
Better to get it done yourself, it looks a bit of hassle but it's not that difficult and you would be saving.
Also i think UD is for 42k and add 2k of reg, so you would need to add further 4k to your 40k budget.