When arranging a rental car, you have to remember to ask for everything you want.
Your hire company won't 'know' that you need a baby seat, and if you don't arrange it in advance there is a very good chance that you won't be able to get one when you pick up your hire car.
Additional drivers are less of a problem - but each one needs to provide their details and drivers' licence when picking up their rented car.
The options that are available when booking a car through CarHirePlace.com depend on the country you are hiring in. Examples of the options that may be available include:
All available options will automatically be shown (with costs) after you have selected your hire car.
(Don't worry - you can still change your car selection after this point if you need to.)

Car hire available throughout Europe including - Andorra, Austria, Belgium, Bosnia, Bulgaira, Croatia, Cyprus, Czech Republic, Denmark, England, Finland, France, Germany, Gibraltor, Greece, Guernsey, Hungary, Iceland, Ireland, Italy, Jersey, Kazakhstan, Kosovo, Lithuania, Latvia, Luxembourg, Macedonia, Malta, Montenegro, Netherlands, Norway, Poland, Portugal, Romainia, Russia, Serbia, Scotland, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey, UK, Ukraine, and Wales.