How buddha came back to his human consciousness if consciousness and fabrication ceases after release

**QN 1:** After complete cessation of consciousness, how did the Buddha come back to human consciousness? If he can come back, isn't it not a complete release? And that state is just like the Dimension of Nothingness, or the Dimension of Neither Perceptions nor Non--perceptions. So if craving again develops, then there may be chance of becoming.
**QN 2:** And is it possible to have complete release through jhana only by ceasing craving, fabrication etc without gaining insight of nirvana. **QN 3**: Buddha stated in many suttas that five aggregates are not-self; but as human being we do require idea of self (identity or ego) and will power (self-esteem). [Like, "*If I try I can learn it or do it etc*"] . Is there any sutta where buddha talked about such healthy ego? _[Here ego word does not mean pride, conceit etc but Identity.]_ Note: Buddha avoided such type of questions because this stop us from direct knowing, but I am asking due to curiosity. But do reply for third question.
Edit: I was not asking about 'self' or 'no-self'. I was asking because it's help us psychologically and even Buddha used to call himself Bodhisattva (Who thinks about well-being of everyone and has compassion towards all.) before awakening because it's remind us about our path. "_I updated my last question because I think it was creating a little confusion._"