1, 2 and 3 do. I studied Russian for 2 years at university. Russian and Latin grammar are very similar. The exceptions would be the verbs. Russian has way fewer tenses, but it uses so many prefixes. http://dcc.dickinson.edu/grammar/latin/declension-cardinals-and-ordinals
Again, classical Latin does not use the subjunctive in this way. Volo should be the correct verb here. Independent uses of the subjunctive do not show politeness.