2. Yes, of course, take a look at the previous lines with the examples. Also the sentence is correct. 3. Yes, you're right 4. You can use the construction "Я хотел бы + noun (in genitive case). I think that the others cases dedmand using of verbs. Я хотел бы машину, как у тебя And don't use пожалуйста ...
In most contexts, "Я бы хотел" is "I'd like/love to", without any sarcasm. – Alexander. Jul 26, 2019 at 16:34. хотелось is Neuter gender (relates to omitted but implied proposition это "it") and needs the subject of desire in Dative. So, мне хотелось бы or simply хотелось бы ("it would be desirable to ...