Are there any hidden charges involved when renting a car that I should be aware of before booking? I want to understand if there are extra costs beyond the base rental price, such as fuel charges, late return fees, taxes, or service fees. Do rental providers also charge for insurance add-ons, extra drivers, or mileage limits? How transparent are companies about these charges at the time of booking? It would be helpful to know what to check in advance to avoid unexpected expenses.