Do these toys actually teaches babies alphabet, music or words?

It might but it looks more like a toy for your kid to mess around with and to "hit" every now and then so reckon it's more for motor skills and good ol' fun! If there's music, then maybe your child will pick up a tune or dance along. Call me old fashioned but the best way to learn words (or read) is through books. Those big picture books or cloth books are really great for kids. You can start off reading to your child, I promise you it's the most personal and best way to learn :)