Answer:
I never was but always will be. No one ever saw me but everyone knows I exist. I give people the motivation to better themselves everyday
I am a cave full of bones and the house of a worm.
I am black and white. I have strings I have keys. I make sound without my lips. I make dough with no flour
I am free the first time and second time but the third time is going to cost you money.
I beam, I shine, I sparkle white. I'll brighten the day with a single light. I'll charm and enchant all. I'll bring the best in you all. What am I?
Black we are and much admired. Many seek us if they are tired. We tire the horse, and comfort man, and turn White when we've fulfilled your plan.