Array waah 1st post after 236 days. Welcome to the forum.
Here's the link of excise department lahore wich is helpful for u where u can calculate the registration charges and car tax things:
http://mtmis.punjab.gov.pk/
New city is exactly 1300cc car so the following is the detail of the payment u have to make for lahore registration. You can do it urslef without involving any agent.
<TABLE border=0 cellSpacing=0 cellPadding=0 width=520 align=center><TBODY><TR><TD class=mvrsTR width="33%">MOTOR VEHICLE TAX</TD><TD class=mvrsTR width="26%" align=right>600</TD><TD class=mvrsTR width="41%"></TD></TR><TR><TD class=mvrsTR width="33%">INCOME TAX</TD><TD class=mvrsTR width="26%" align=right>1,500</TD><TD class=mvrsTR width="41%"></TD></TR><TR><TD class=mvrsTR width="33%">PROFESSIONAL TAX</TD><TD class=mvrsTR width="26%" align=right>200</TD><TD class=mvrsTR width="41%"></TD></TR><TR><TD class=mvrsTR width="33%">REGISTERATION FEE</TD><TD class=mvrsTR width="26%" align=right>26,460</TD><TD class=mvrsTR width="41%"></TD></TR><TR><TD class=mvrsTR width="33%">MISCELLANEOUS</TD><TD class=mvrsTR width="26%" align=right>0</TD><TD class=mvrsTR width="41%"></TD></TR><TR><TD class=mvrsTR width="33%">NUMBER PLATE PRICE</TD><TD class=mvrsTR width="26%" align=right>1,000</TD><TD class=mvrsTR width="41%"></TD></TR><TR><TD class=mvrsTR width="33%">WITH HOLDING TAX</TD><TD class=mvrsTR width="26%" align=right>16,875</TD><TD class=mvrsTR width="41%"></TD></TR><TR bgColor=antiquewhite><TD class=mvrsTR width="33%" align=middle>Total</TD><TD class=mvrsTR width="26%" align=right>46,635</TD><TD class=mvrsTR width="41%"></TD></TR></TBODY></TABLE>