The sales guy is spewing non sense about the tariffs, that's not related to the dealer fee. If you're not comfortable with the mark ups, I'd walk out of the deal since the deposit is refundable. How long is the theft, windshield protection and road hazard protection for? For $1300 sounds...
That $999 admin fee can be waived. Majority of the dealerships in the GTA are marking up $500-$999, but there are some honest ones that are tacking on $0 dealer fee. I hope at the very least you're getting trunk and interior mats from the dealership for that markup