If you have not done so already, read and do this:
https://support.steampowered.com/kb_article.php?ref=2347-qdfn-4366

Your TF2 Outpost account will most likely be banned. When you have complete control over your account once again, refer to this: https://steamhost.cn/steamcommunity_com/groups/tf2outpost/discussions/0/558747922562007365/

Note: You will need to screenahot your support ticket and include it with your appeal.

I have reported my Hijacked account already, thank you for your support. Is there another way to want people that my account was stolen?

Not that I know of, most people probably will not fall for it anyways and will just end up reporting your account to Valve. Nothing you can really do at this point but wait for Steam Support to respond to your ticket.

And what's that with the screenshot?

Example: http://imgur.com/ZMllHoo

It is just further documented proof that you have access to your account.

So this comes to my Mail? Am i right?

Not exactly.

Any tickets from you can be viewed online.
https://support.steampowered.com

Your email is mainly for notifications.
You will get notified through email if:

You have sent a ticket.
Example: http://imgur.com/USCPkCb

You have replied to your ticket.
Example: http://imgur.com/TAieIzv

A staff member has replied to the ticket.
Example: http://imgur.com/dBHReKY

Anyway, i send Steam my last paying info: 4 last credit card digs and stuff like PayPal.

So, when i get my account back, then I should make a new ticket requesting my items? I had some pretty rare items going on.

Valve will restore your items automatically when they give you your account back.

I am very happy to hear that!