Do you think telescope is right tool / instrument / apparatus to check life on other planets or to observe sky / space / universe ?

What else is there? They gather light, radio and micro waves. If you have a better tool, we'd like to know.

No.

Telescope can;t make out those small thing at such HUUUUUUGE distances.

To do all of that you would need a BILLION Dollar telescope in Earth Orbit.

Yes,

The telescope is an instrument in full accord with all other scientific instruments, which has successfully proven that we are alone. How much more "right" can you get than that?

Cheers!