(adsbygoogle = window.adsbygoogle || []).push({}); Can I use these tools without a jailbroken ps3???

No u Can't

U can downgrade ur PS3 or Buy A Cfw/jail broken PS3

But u can use save editor

What's a save editor?? Sorry I'm a new noob ,And how much does it cost to Downdgrade and Jailbreal a ps3

A save editor is a program that lets you edit your game saves and help you get stuff, its The closest you can get to mods without a jailbreak.
And downgrading tour ps3 is about $60 depending on who does it for you. And buying a jailbroken ps3 is usually around $200-$250

Just check out amazon or ebay.
You can buy an E3 flasher and downgrade your console by yourself.
You can pay someone to downgrade your console which is about $30-60.
Or you just buy a console which is already jailbroken which is about $150-200.