Never send in things that are not asked for. You're more likely to complicate matters than simplify them.
Also, even if you did send every page, they would likely ignore it at the point that you sent it in, then when they wanted it later on they would just ask for it again.
On top of that, the "purpose" of asking for every page is an attempt to catch you doing something wrong. If you already sent every page of your passport from the beginning, that defeats the purpose. At that point they would just ask you for something different, like proof of receipts and photos of your location.
There's no "easy" path to permanent resident. But out of everyone, it's foreign women married to Thai men that will meet the least resistance. But that takes years, and it would have to be completed before the spouse dies or else their application would be cancelled.
If your visa is based on a marriage, and your spouse dies, you can remain in Thailand until the end of your extension. After that you either need to apply for an extension based on a new reason, or leave Thailand.
Anonymous participant Just based on questions people have received when entering Thailand, it would be best to apply in Australia if at all possible.
Some people have been asked "why didn't you apply at home?" rather than a country near Thailand. It just looks better to them. That you planned it out and you are legitimate, rather than someone who was already living in Thailand and then got the DTV just to continue doing so.
You cannot apply together. You must have yours before she can apply for hers. One of the requirements for a dependent DTV application is the already issued DTV of the sponsor.
Absolutely do not apply in Malaysia. They are very strict and you have a high chance of being rejected. It will also take more than a month to process. Most people are going to Vietnam lately. 1-2 weeks.
Why don't you apply in Australia before traveling though?