The annual Tax should be written on the registration papers muliply it by 4 i.e from 2005 to 2009.
Should be around 2.5k per year for 2.4L (could be more as per model and registration year)
If the the registration is from Karachi then it will take round about 2-5k to convert in your name.
Also remember to take the "return file" of the documents from the Motor Tax office as they have informed the public that records are unsafe and should be claimed by respective owners.
And if your papers are old "non Blue book type" you should have Blue book type papers made. Waslaam,