1.) I think Extraterrestrial life exits, but probably it's not possible find ET with radio telescope. And when? : I really don't know but I hope it will be during my life.
3.) I run SETI because I want to help find ET or anything interresting in space.
SETI@home and Astropulse are funded by grants from the National Science Foundation, NASA, and donations from SETI@home volunteers. AstroPulse is funded in part by the NSF through grant AST-0307956.