No difference. It's frequency response, for all 3 of them.
Not close to correct, at least not in the disciplines within which they are most frequently used. In hi-fi discussions they are too vague, unspecific, or ill defined to be particularly useful. The question of their differences is also too vast to be covered in a compact thread. Nonetheless, I will toss out a very incomplete overview of their use within their most relevant domains.
Timbre is almost universally used to describe the quality of a sound, typically of a musical instrument or voice. There was a long, often contentious thread on ASR about how one might describe, define, or specify timbres.
Tonality, within musical domains, refers to the harmonic scheme (and style periods) to which a genre or piece of music belongs. For instance, Most Western music from c 1600-1900 is tonal, i.e., it employs what is called common practice harmony. Blues and Beethoven (and tons of other music) fall into this system. Most earlier music is either known to be or theorized to have been modal, as is most non "Western music.*" Music of 20th and 21st century is filled with various "tonal schemes" which are neither modal nor common practice, a list of which (very incomplete) includes atonal, serial, microtonal, and polytonal (which also describes some non-western and early musics).
Tone, used by itself, is too vague to be useful in most discussions. In music, a single pitch might be called a tone or it could also be used as a rough synonym for timbre, comparing or describing similar timbres, which is close to its least scientific use in audio discussions.
This barely scratches the surface. Good luck filling in the gaps.
* Ironically, K-POP is musically Western, Eastern geographically. Like Blues, Jazz, and R&R, it is a fortuitous collision two (or more) musical schemes.