"Stagiaire de la formation continue", pole-emploi will give you 650e per month even if you don't have any remaining rights for 3 years, they consider it's a formation to get a job later. It's not the RSA if that's what you're thinking with the 25+ yo.

If you worked previously. I don't think pole emploi would give you money to study. So for people with long term unemployment, that would not work.

I've been working 2 years, lost my job and started 42 8/10 months after, worked for me.

Well you certainly have the money to live around paris. I really don't.