Thank you for using JustAnswer.
I'm sorry to hear about your situation. Per your questions:
do I have a right to go into our home while he is gone to take pictures of the things in our home so I'll have proof of what's in the home when I begin our divorce? - Yes. It's still the marital home. Bring proof that you resided there and have a right to be there (name on a mortgage / utility bill / etc...) just in case, but as it's the marital home you can enter the property at your will.
Also is it too late to press charges on him even though the state is pressing charges and can I get a protection order on him? - The state doesn't "press" charges. The state actually charges. "Pressing charges" means that you indicate your desire that he be charged. The state (through local prosecutors) have the prosecutorial discretion whether or not to actually bring charges against him for a crime. You can certainly contact the prosecutor and say that you wish to join in on the prosecution, and that you'll do anything that you can to assist. But if they're already charging him, then "pressing charges" would be redundant.
You can get a protective order if there's an ongoing significant threat of physical harm or severe harassment by him. If he doesn't know where you live and has no intention of actually harming you, you wouldn't be successful in getting such an order. But if you could establish that he had the intention to harm you, then you could. It would be your burden of proof to show that he had such an intention, but if you could, you could get that protective order.
Hope that clears things up a bit. If you have any other questions, please let me know. If not, and you have not yet, please rate my answer AND press the "submit" button, if applicable. Please note that I don't get any credit for the time and effort that I spent on this answer unless and until you rate it positively (3 or more stars). Thank you, ***** ***** luck to you!