if ur going for a vacation, probably u have relative, tell them to locate something for you, Renting a car in Pakistan isnt easy, and renting from a random person can be tricky as well.
Euro cars is a world wide brand, but i guess they charge thousands of dollars which isnt practical at all, maybe goras can pay but normally you can get a Corolla for rs.2 to 3 thousand a day. Monthly and weekly rates may differ.
Always rent a car from someone you know, Other wise on returning they realy give you trouble.
Other then that, its realy not much of a hassle, its a business, many people daily rent cars on daily, weekly, monthly basis, so just be sure when ur renting a car, dont save money, spend a little more but rent it from sumone who has new cars and seems good too.