Among the first passengers to arrive at new Terminal 2 of Toronto International Airport-used only for trans-Atlantic charters-are Leila Raisanem (glasses), her mother, Seija Sjoblom (white hat), and her children Petteri, 7, and Katri, 13, who were met by relatives here. About 400 people were on hand to greet the flight-f Finn-air DC 8 from Helsinki with 189 passengers-and the reception room was as crowded as at the main terminal, half a mile away.