First of all, what Pump did you buy, what horsepower was it and what horsepower and brand was the old Pump?
When priming, you need a backpressure control of somekind to get the Jet to operate. A ballvalve between the Pump and Tank can serve as a temporary control, but should be replaced with the real thing.
You may not have the pipes filled yet, that is why the Pump keeps on needing another quart. Keep filling until full like you have been doing and it may take off. This is not an easy thing, so be patient.