I suppose you have visited these 2 medhelp threads on porn-induced ED. It's helpful to converse with others who have this problem
http://www.medhelp.org/posts/Mens-Health/22-with-porn-inducederectiledysfunction/show/469209?page=1
http://www.medhelp.org/posts/Mens-Health/Too-much-porn-masturbationcause-ED/show/183203
1) Cured: some signs include return of very full, spontaneous erections, and high libido when thinking about real girls.... but it doesn't happen for every guy. The primary sign is strong full erection when masturbating using only sensation - no fantasy.
2) Masturbation does not cause ED, porn does. However, all guys who recover discover that their true sexual desire is different without porn. Everyone needs to chart their own oath with masturbation.
3) Depends on many factors. If you started porn at 11, and consistently used it, then it could be 60-120 days. Only one way to know
I suggest visiting yourbrainonporn to learn all about porn and ED. Look under the first FAQ
2)