there are no commands for running "webchaind.exe console" in the link the command are only for "webchaind.exe" bat. also what's the command for getting balance?
For getting the balance you can use:
web3.fromWei(webchain.getBalance(webchain.accounts[0]), "ether")
The above command running in console. You can check many other commands and examples here
https://github.com/ethereumproject/wiki/wiki/JavaScript-API.