Now that you have given more information about your budget and your plan here is what I suggest.
This car being in Pakistan and the fact that it still has its original engine in it.
1, I would get the engine rebuild because these engine are built to last.
2, Get the denting and painting done.
3, Get the interior done.
4, Put some nice rims.
Upgrading to a more powerful engine is pointless given the price of fuel and road condition in Pakistan and you being an student isnt helping much to this cause (spending dads money isnt fun). Plus at the end of day it is still an old car and unfortunatly old cars are not appreciated all that much.