'Worth to know'

No.

What's it worth to know the alphabet

I assume the phrase you're looking for is what most people would write as "worth knowing."

For example: "History is worth knowing." Which is a common way of saying something like: "The effort it takes to learn history is worthwhile."

Some would just say "good to know."

Nope. You should change it, for example, "that tip is worthy to know " or "it is worth knowing"