The 17-year-old has joined the Magpies from BSC Young Boys in Switzerland, penning an initial three-year contract, and could make his competitive bow for the under-23s in Monday's Premier League 2 game at West Bromwich Albion (kick-off 2pm BST).
Born in Dakar, Senegal, the forward moved to Switzerland at a young age and has represented them at under-17 level, scoring twice on his debut against Austria last year.
And although he didn't make a first-team appearance for Young Boys, their under-21 side played in the third tier of Swiss football and won the title last season.
He told nufc.co.uk: "I'm very happy to sign for Newcastle.
"I've heard a lot about them. I know it's a famous club in England and I'm very, very happy to be here. "There was a lot of interest in me, but I chose to come here because it's a great and traditional club in England.
"I'm an offensive player and I like to score goals for the team. My position is a striker but I can play on the left and right.
"I want to work hard, to learn and ultimately to play for the first team."
Toure, who joined Young Boys at the age of ten, has already been taking English lessons and most of his first interview was conducted without the assistance of a translator.
And he hopes that he can adapt to life on the pitch just as quickly - particularly in the Checkatrade Trophy, which will see United once again face sides from Leagues One and Two.
"That is a very good challenge for me," he said. "It's an opportunity for me to show what I'm capable of and have more game time.
"It will be an experience, an introduction to English football for me, because it's something new for me. Maybe it will help me to establish myself."
And while he knows he will have to prove himself if he is to catch the eye of Rafa Benítez, Toure has already had a taste of the Premier League, albeit from the stands.
"I came to the stadium and watched the Chelsea match (on the final day of last season), which was very good," he revealed.
"Newcastle won 3-0 and it was a great match. And I saw the fans, who were crazy. They live for football and are so passionate, and I like that very much."
Another new signing Rosaire Longelo could also make his competitive debut at West Brom's training ground on Monday.
Defender Liam Gibson is likely to make his first league start since May 2017. The full-back underwent four operations after being diagnosed with ulcerative colitis.
Sean Longstaff, Freddie Woodman, Cal Roberts, Jamie Sterry and Víctor Fernández - who all featured for the first team in pre-season - could also face the Baggies.
