1 - Meaning of Messiah - Incorrect. They're the other way around. 'Christ' (Christos) is a translation of 'Messiah'. Having said that, either way, the actual meaning of both, in whichever translation, is 'the anointed (one)'.
2 - Three specific OT passages - I only asked for three, so I'll take your first three, and yes, Isa 53, 2 Sam 7, and the Daniel passage referring to the Son of Man (Chp. 7) are all good. Correct.
3 - Three NT Books dealing with Messiah -Correct.Hebrews...Romans...Matthew...
6/7 Correct.