Age? This will depend on the instrument.
Voice lessons these begin ages 12-14 and up.
Clarinet 9-10 years old and up
Piano, case by case but I have seen 7 and up works the best.
Lesson Length? Each lesson is 30 minutes in length
Price? $27 a half hour lesson
Materials? Each student will be assigned a lesson book and theory book. You may either buy these on your own or you can purchase them through me.