hello, what are the examples of classical ciphers in SAGE?

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You can get the list of

• classical cryptosystems (classical in the sense of "historical", e.g. Vigenere,...) http://doc.sagemath.org/html/en/refer...
• more recent cryptosystems http://doc.sagemath.org/html/en/refer...

The general index of cryptosystems implemented in Sage can be found at http://doc.sagemath.org/html/en/refer...

In any case, note that those implementation are written for educational or research purpose, not for deployment.