Angels are Allah's creatures and obedient servants, not divine beings. Faith includes affirming all true prophets and messengers.
Abraham's intimate friendship with Allah and Moses' receiving divine speech are distinctive honours. Affirming them does not erase the difference between servanthood and divinity.
Revealed scriptures are guidance from Allah. Affirming the divine origin of the scriptures sent to earlier prophets is joined with the obligation to follow the law brought by Muhammad ﷺ.