Clear my choice
1) I don't like to do manual work(Rewrite the sentence
using would)

l would not like to do manual work.

themselves

an intensive pronoun is a pronoun that ends in self or selves, such as himself, herself, themselves, yourself, ourselves. since band members is a third person plural, the correct intensive pronoun would be themselves. if the band was talked about as a collective noun, itself would be the appropriate intensive pronoun. intensive pronouns are used to add emphasis to the noun it's modifying which is why it directly follows it.

the god   the goddess of salt water, of fresh water   yet more powerful and perfect.