If you have plans to travel to Pakistan for Tourist or Business purposes then you first need to take a visa.
If you have an option to visit at Pakistan embassy and submit your application there, then you have to apply online for Pakistan eVisa .
About Pakistan Visa Fee , there is no standard fee for travelers. The Charges are depending on the type of visa you are selected and the country where you are from.
For Pakistan tourist Visa and Pakistan Business Visa, there is a different fee for both.