Are usually of the 'Light' type
That is only partially filled to get you started.
One reason for this[apart from the obious] is that Cartridges have a shelf life- and who knows how long long the printer in question has been in transit to the end user-shipping-warehouse-sales point.
The answer to your question -original-compats -CISS[if available of that particular machine]
simply depends on the volume of work you expect to throughput.
If this machine follows the Canon normal style of being a Thermal Inkjet[Where the print head is part of the cartridge]- then CISS may not be an answer because the heads do 'burnout' in time and therefore a cartridge will needed.
CISS is more suited to Epson type machines where the head is of the piezo type and integrated in the machine.