Registration cost for Attiv X cvt is 69790/- in punjab.
You should go yourself. Just book appointment from excise website and go there on time. Get the form F and file flyer from outside for 50/- rs. and go inside, get token from front counter, go to the new registration counter on your turn, pay him cash and get the receipt. Thats it. Number plates are delayed, so you can get your own from the market for 300-1000 depending on quality.
I am not sure if your wife has to visit the excise office or not. You can check that by calling their helpline.
There is no balance payment form. I booked from Toyota Sahara Lahore. I just went there with the pay order of balance payment and they gave me receiving on its copy.