well i dont know should i trust these things, those free stuff u can do to to get more toricredits. So please, can someone healp me?

Depends on what do you really mean...

If you mean the surveys...
Some of them require real life money, some of them require just a valid e-mail.
And some of them need something between those, e.g. address, phone number etc.
Plus, most of them don't work, anyways. So I would say they're pretty useless.

If you mean the in game link spammed by some random people...
They're a scam. It's a phishing site that saves your login information and with that it wipes your account clean of items... Which go to the owner of the phishing site.

ok well i meant the surveys but i was thinking myself like: "How to hell do i get toricredits from sendig an SMS to buy some mobile games" but thank you for telling me that.So pretty much only ways to get tc is if u either win a lot of matches in offical servers or buy them, Am I Right

Well, actually some of them work, but it's mostly about luck most of the time.
I did maybe about 20 different ones or so, and only about 5-6 worked, so they aren't completely a scam, just rather annoying and picky, really.

Imo the boosters are the best way to earn tc, plus you support nabi

I didn't used any surveys and I'm sorta happy. Trust or don't trust that surveys is only your choice. Btw, you can find other methods of getting TC, like making textures or winning tourneys

The surveys are a legit way to get TCs. However, use an email address you don't mind getting full of spam, because you'll get a LOT of it.