1. If I store Bitcoin in Trezor and eventually I lost the device, can I retrieve the Bitcoion to any other wallets, including online wallets like Mycelium, using the master seeds.
Regardless of the fact that the answer to your question has already been answered and that the answer is that it is possible, my advice is not to enter your seed anywhere else except in another hardware wallet, especially if the value of the coins you keep is significant. If you can't be sure that you have a 100% clean computer (virus & malware-free) and that you know how to verify a wallet file before installation, you end up in a situation where you can literally lose everything in the blink of an eye.