Also they are currently supporting less coins then Ledger so not sure if that was the right choice.
I used to own a Ledger Nano S, but I decided to sell it. I had problems with long loading times of their Chrome wallet. Quantity doesn't mean quality.
When will the Model T be available on the website?
I missed the preorder.
According to their Twitter and Telegram chat, somewhere in the Q2 2018. I would expect new sales somewhere near June.
Is it possible to restore a trezor one wallet into trezor t if the trezor one also used a password?
By password you mean a passphrase? You can enable it in the device settings on the TREZOR wallet website. You should be able to see your bitcoins after you restore your seed properly and enter the correct passphrase.