They don't sell the 1 year non O any more. You buy the 90 day visa and then fulfill the requirements for 1 year extension before the 90 day stamp expires.
Be aware that you're Vietnam entry Visa is likely in your old passport and Vietnam's pretty stickly for seeing all the pages of your passport so I suggest you show all the pages of your old passport and at least the first few pages of your new passport which your application will be done under. Suggest a brief cover letter explaining the passport situation.
Generally documents must be in English or Thai. As you note the bank statement would typically mostly be numbers, so you can highlight all the relevant transactions, your name, account number, etc. You can use something to translate and provide both the original and the translated copy. Try and make your submission as clean and organized as possible, so the embassy staff aren't going on a treasure hunt.