i have downloaded many photoshop actions. but i have no idea how to use it. is there any tutorials or smth?

What do you mean... "photoshop actions?"

what is
that fount?

^ arrie garde, or something like that. or decker.

Are you wondering how to install them?

Next time, Post here: http://www.createblog.com/forums/index.php?showtopic=119935

There's several tutorials on actions here, but you have to download it.

There's also one here, which is pretty darn informative. I suggest you try that one first.

File > Automate > Batch
Choose your Set and Action at the top of the box. Choose your source and destination. Click Ok. Watch the magic.

(If the action includes specific saving step, check "Override 'Save As' Command," if not, don't check it.)