Chodesh Tov means "have a good month" and is the traditional greeting used on Rosh Chodesh.
good Chodesh
If you mean the Tov, it is "good". There is no such word as Tobe in Hebrew.
Assuming you mean holidays, they are:ShabbatRosh HashanahTzom GedaliahYom KippurSukkotHosha'anah RabahShmini AtzeretSimchat TorahChannukahRosh Chodesh TevetAsarah B'TevetTu B'ShvatTa'anit EstherPurimRosh Chodesh NisanPesachYom HaShoahRosh Chodesh IyarYom HaAtzmautLag BaOmerRosh Chodesh SivanShavuotFast of Shiva Asar B'TammuzThe Three WeeksFast of Tisha B'AvRosh Chodesh Elul
Maya Tov means "A good Maya". BUt I think you might be asking about Mazal Tov (מזל טוב) which means "congratulations."
Those two words, literally translated from Hebrew, would mean "good, thanks".
hu hag tov (הוא חג טוב) means "it is a good holiday". It is a line from a Hanukkah song.
tone of voice
It means 'Good morning'
it means good sign
All work is allowed on Rosh Chodesh, however some women have a custom to not do certain types of housework on Rosh Chodesh. Some have the custom to not have haircuts nor cut their nails on Rosh Chodesh.
Siman tov u'mazal tov v'siman tov u'mazal tov, siman tov u'mazal tov v'siman tov u'mazal tov, siman tov u'mazal tov v'siman tov u'mazal tov, y'hey lanu. Y'hey lanu, y'hey lanu, u'l'khol Yis'ra'iel, y'hey lanu, y'hey lanu, u'l'khol Yis'ra'iel, y'hey lanu, y'hey lanu, u'l'khol Yis'ra'iel, y'hey lanu, y'hey lanu, u'l'khol Yis'ra'iel.
It refers to the beginning of the new month (according the lunar/jewish calendar)