Does the amount of money raised in an ico determine the success of the project??
Is a necessity to do a fund raiser in order to start up a project??
Did satoshi nakamoto and vitalik also started a fund raised??
1. Not necessarily, but it definitely can help. If you can't raise as much as needed for the mvp, then you can say good bye. But there are also a lot more to what determines the success of a project.
2. Depending of a project. If it needs bigger investments to get started, then yeah, you need to raise funds somehow. If you have the know-how and don't need to raise much funds, then you can get going without it.
3. They just had the skill-set already, that was needed for them to get it going.