Mr Trotter, 41, promised to buy a pony for the 10-year-old daughter they had before splitting, but he insisted she would not be spoiled and said he had no plans to send her to public school.
"Like any ten-year-old she's not taken it in really," said Mr Trotter. "Even I can't take in how much money it is. She just wants a pony. I brought her up that she can't have things willy-nilly."
The car enthusiast, who ran his own garage for 15 years, said he was likely to swap his Ford Focus for the latest McLaren supercar, the first of a planned fleet of top-end models.
For now, though, Mr Trotter, a keen angler, was focused on buying a Land Rover and a house in the countryside for himself and 33-year-old Nicky Ottaway, the partner of eight years he met in a fishing tackle shop.
"There are a lot of stunning cars out there - I'm going to need a lot of garage space at the new house," he said.
Mr Trotter opted to go public, he added, because he was determined to "stay the same person". His father, he said, rejected his offer of a new house but he will give £500,000 to his younger sister, a mother-of-two with a chronic illness.
The car enthusiast said he wants to use his fortune to follow his passion for British touring car racing. He previously achieved a promising sixth place as a newcomer in the BMW Compact Cup series.
Mr Trotter, who grew up in Old Coulsdon in Surrey, has now closed Chameleon Coachworks in Mitcham, a business his father said would never make him rich because of his "fastidious" approach to every repair job.
The mechanic, who said he was convinced that he would be a millionaire one day, said that he has already encountered some problems with his new-found wealth.
Accounts assistant Ms Ottaway said when she asked about the price of an £11,000 Mulberry handbag in a Croydon department store, the sales assistant walked away. "I hope he is regretting it now," she said.
"With that sort of money you can do a lot of good," said Trotter. Photo / Thinkstock
"That really, really grates on me, when people look at someone straight away, they have an impression of someone," said Mr Trotter. "I always knew I was going to be a millionaire, I'm a Trotter. I've always believed.
"I was driving to work and I had a funny feeling that I had to play the lottery," said Mr Trotter, whose fortune would earn more than £750,000 a year in a High Street bank. "I didn't even know it was that much money. I just knew I had to do it."
Mr Trotter, who has four brothers and sisters, stopped in a Londis in Wallington on his way to work and bought £10 worth of lucky dip tickets on the day of the draw, last Friday.
He won £107,932,603.20 after matching five numbers and two lucky stars. He is the first Briton to win the jackpot this year.
When he told his partner he'd won she told him to stop being stupid. He also rang his father who asked him if he had been drinking. The couple celebrated with two bottles of Budweiser beer.
"Nicky said I went as white as a sheet. She said what's wrong and I told her I'd won," said Mr Trotter.
Mr Trotter said he was not fazed by the scale of his jackpot, and does not think £108 million is too much money.
He added: "Everyone dreams of what they could do in the world to change things, help people out, family and friends. With that sort of money you can do a lot of good.
"My little sister is quite struggling so I have offered to help her out and buy her a house. She won't stop crying," he said.
Mr Trotter's businessman father Jim, 69, said he had rejected his son's offer of a new house, even though Camelot have been instructed to involve him in decisions on financial planning.
"On Friday night he said to me do you want a new house. I said no, and that I would not be the first person with my hands out," said Jim. "I don't need his money. I've got everything I want in my life. I'm nearly 70 years of age. I've got a nice house and two nice cars."
