‘Yes, sir,’ said Riddle again.
It was impossible to tell what he was thinking; his face remained quite blank as he put the little cache of stolen objects back into the cardboard box. When he had finished he turned to Dumbledore and said baldly, ‘I haven’t got any money.’
‘That is easily remedied,’ said Dumbledore, drawing a leather money-pouch from his pocket. ‘There is a fund at Hogwarts for those who require assistance to buy books and robes. You might have to buy some of your spellbooks and so on second-hand, but –’
‘Where do you buy spellbooks?’ interrupted Riddle, who had taken the heavy money-bag without thanking Dumbledore, and was now examining a fat gold Galleon.
They also might help with that in some cases even - like Tom Riddle had no money and lived in an orphanage and still went.
Indeed:
– HBP13