"I read the information on the wallet and on the coin. Is this a coin for other coins?"
Yes:
Taler can be used for different currencies (such as Euros, US Dollars or Bitcoins) and any amount,
limited only by applicable regulatation and what denominations the payment service provider supports.
"How can this coin be transparent to the judiciary and hide its masters?"
Despite offering anonymity for citizens spending digital cash to buy goods and services, Taler also ensures that the state can observe incoming funds. This can be used to ensure businesses engage only in legal activities, and do not evade income tax, sales tax or value-added tax. However, this observational capability does not extend to the immediate personal domain. In particular, monitoring does not cover shared access to funds with trusted friends and family, or synchronizing wallets across multiple devices.
As a payment service provider, the Taler exchange is subject to financial regulation. Financial regulation and regular audits are critical to establish trust. In particular, the Taler design mandates the existence of an independent auditor who checks cryptographic proofs that accumulate at the exchange to ensure that the escrow account is managed honestly. This ensures that the exchange does not threaten the economy due to fraud.