all/it all/everything
When starting a story, whats the best option
It all started when...
Everything started when...
All started when..( I think this is not corrrct isn't it?

Thanks

Question

all/it all/everything
When starting a story, whats the best option
It all started when...
Everything started when...
All started when..( I think this is not corrrct isn't it?

Thanks

Answer

It all started when... 
Yes, this is a common beginning.

Everything started when...
This is also possible, but less likely.

All started when..
This is ungrammatical, as you pointed out.