OK, you still don't seem to understand why more information was needed for this to be an acceptable question.
Other people don't have all the context you do. Therefore without some parameters about the situation, they will waste their time giving pointless answers - like the guy who had to delete his big ol' answer because you finally got around to explaining "oh our custom time travel doesn't work that way." Even Brian's graft etc. suggestions I'm not sure will work in this situation, tattoos and grafts and stuff should go if it's really terminator mode but you're not even sending your body back, just your spirit, as it took a whole week for you to mention.
Just saying "100k, no gear" doesn't make an optimization question good. "Optimize me!" OK, here's a way to use that to get +10 to WIS. Is that good for your character? Or not? hard to tell if you can't be arsed to say what class and level you are. We have general guidance on optimization questions here for that reason. Optimize what exactly, for what purpose exactly?
When you say "time travel to the distant past," that could mean "you're all popping out in dinosaur times, no civilization around, food and water and normal swords will be a challenge to get."
The question still has a bit too much on what doesn't help (your byzantine time travel plot) and a bit too little on what you need to do. When you drop back into your level 1 body, were you fighting vampires in Karrnath? Or just hanging out and conducting courtly intrigue in Breland?
The question doesn't have to be long, it just has to have the important parts in it. Here's an example that wouldn't have been closed and would probably only have needed a couple clarification comments before people could answer effectively.
"I am a level 12 human swashbucker that specializes in two-weapon fighting and diplomacy. In two weeks I and my party will be traveling back in time - our souls will move back to inhabit our first level bodies from 30 years ago. We can't take gear with us, though intelligent items' spirits will come back with us and can go into gear of the time. Body modifications like tattoos won't travel but permanent spells, inherent bonuses, and things like that will. When we will go back, we will be based in courtly society in Breland but also doing cross-country adventuring, trying to survive for three years and change the past by killing the vampire king of Korrath.
I have 100,000 gp to spend. What can I do in the two weeks I have to enhance myself for this trip?"
That doesn't require lengthy explanation, it just requires insertion of the facts that bear on your problem.
In the end, if you ask questions that make people go on fishing expeditions, a) they get closed and reopened, b) people write answers that have to get rewritten and/or deleted, and c) eventually people decide that maybe answering your questions is more trouble than it's worth. So it's in your best interest to learn how to ask effective questions.
In fact, it's worth restating one of our fundamental SE best practices. Ask about your PROBLEM, not about your SOLUTION. All the parts you spent actually talking about the parameters of your specific situation and what you want to achieve were valuable. Parts where you assumed a given answer and drilled down into that generally led people down wrong paths. So don't assume an answer or a solution. Post your problem, with all the appropriate parameters that would rule in/out solutions, and let people answer with the actual solutions.