Is chemotherapy is the only treatment for ca besides surgery?

Depends. There are many different types of cancers, and many different types of treatments. Surgery is frequently used to remove cancers. Chemotherapy is used to then treat to prevent cancers from growing back again. Radiation therapy is another treatment for some cancers. Most cancers are treated with a combination of either surgery, chemotherapy, or radiation therapy.
No. There are many different treatments for cancer. Their uses depend on the type of cancer, the site(s) of the cancer, and, most importantly, the underlying health of the person with cancer.