Yes, you will need a FC to make your vehicle road legal. For private vehicles, FC is issued for 15 years when the vehicle is bought brand new and then renewed for 5 years thereafter depending on how 'fit' your vehicle is deemed.
One of the requirements to obtain a FC for an old vehicle is a valid PUC certificate. You will also need to pay a fee labelled 'green tax' to obtain the FC. this is about all I currently know. Rest is left to the gurus!!