What code? You are trying to find your ETH address? First thing is blockchain doesn't support ERC20 tokens. You have to make ERC20 supported wallet to get ERC20 tokens. Myetherwallet, MetaMask, ImToken are some ERC20 tokens supported wallets. If you want to convert some ERC20 tokens to fiat currency first you have to find that tokens on some exchanges. If that tokens in exchanges you can convert them to BTC or ETH. After that you can withdraw to your card or bank using cex.io, coinbase and many more trusted sites. If you have questions with it PM me I can help you.