Every part of that is false.
He began by founding Zip2, coding the platform himself and selling it to Compaq for $307 million(but had involved multiple investors, and given his brother and founder status as co-founders, so he ended up with only $22 million of that sum).
Then he started
X.com, which became the world’s largest online banking solution with about 2 million users. That company merged with a smaller company called Confinity, forming PayPal. So he wasn’t just a “co-founder of PayPal”... PayPal inherited its user base, much of Musk’s code, and his ideas from
X.com.
When PayPal was sold to eBay, he made around $180 million and used that money to start Tesla and SpaceX.
Elon Musk has been central to the design and engineering of every Tesla car and every SpaceX rocket from the beginning.
Tesla was founded by Elon Musk, Martin Eberhard, Marc Tarpenning, JB Straubel, and Ian Wright.
Musk suggested the name “Tesla Motors” to Eberhard while both were loosely involved in another EV project, the T-Zero. They didn’t own the name since a guy called Brad Siewert had already registered it.
Although Musk officially joined six months after Eberhard and Tarpenning registered Tesla, the company then existed only on paper… no staff, no office, no funding, no IP, no prototype, no design… just the idea of commercializing the T-Zero.
Musk’s first move after joining was buying the rights to the "Tesla Motors" name from Siewert. He was introduced to T-Zero by JB Straubel, who became Tesla’s first CTO. After experiencing it, Musk wanted to commercialize the concept, and AC Propulsion (makers of the T-Zero) connected him with Eberhard and Tarpenning.
Musk has been directly involved in the design and engineering of all Tesla vehicles since the start… the 2008 Roadster’s delay came from design and engineering changes he insisted on.
In Eberhard’s lawsuit, he sought recognition as one of only two founders (with Tarpenning), but the judge rejected this, struck that claim. The court argued that Musk, Straubel, and Wright were also integral to Tesla’s founding. The case was settled with all five recognized as founders.
Eberhard and Tarpenning left before Tesla’s first car hit the market. It was Musk who led Tesla to success with the Model S, X, 3, and Y
And you said SpaceX was successful because of Tom Mueller - Here’s what Thomas Mueller(top SpaceX rocket engineer) said about Elon Musk:
“Elon was the best mentor I've ever had. Just how to have drive and be an entrepreneur and influence my team and really make things happen. He's a super smart guy and he learns from talking to people. He's so sharp, he just picks it up. When we first started he didn't know a lot about propulsion. He knew quite a bit about structures and helped the structures guys a lot. Over the twenty years that we worked together, now he's practically running propulsion there because he's come up to speed and he understands how to do rocket engines, which are really one of the most complex parts of the vehicle. He's always been excellent at architecting the whole mission, but now he's a lot better at the very small details of the combustion process. Stuff I learned over a decade-and-a-half at TRW he's picked up too.”