I wonder whether.. ("I wonder if..." would be better because "whether" would be a scenerio between two opposite things. Like, "I wonder if I"ll look back favorably on the things I did in my life or not." The "or not" making the difference. Just so you know. ;) )

... when I´m 80, I´ll be agree with the things that I did in my life.
I would not like to regret some things that I did not do, and I would like was done.
I'd prefer repenting about things that I did and that I should not have done, but not I stay with things I did not do or to know.
Someone understand my idea?

I do! hehe. I have made mistakes, but I also think that it is better to live and learn instead of always wondering "what if..."

I wonder if..

... when I'm 80, I'll be agree with the things that I did in my life.
I would not like to regret some things that I did not do and I would like to have done.
I'd prefer repenting about things that I did and that I should not have done, but not things I did not do or know about I stay with things without to do or to know.
Does someone/anyone understand my idea?

the use of "would" here sounds awkward to me. I would have said something like "I wonder if when I'm 80 I'll agree with the things that I did in my life. I don't want to look back and regret the things that I didn't do and would like to have done. Instead, I'd prefer repenting about things I did, and shouldn't have done..."

I totally agree with you though! Live life without regrets! Take chances, risks, and seize new opportunities! :) Great post!