Okay, i'm new to jazz, so can anyone tell me what are jazz standards?? Are they like a specific chord porgression (e.g. I IV V)??? Plus, what scales can sound jazzy???? Sorry but i'm a newbie to jazz so i apologize if this is a basic question.

cheers, Aidan.
Jazz standards are jazz tunes that over time have become...standard. A Real Book is a book of standards.

The chord progression most associated with jazz is the circle progression. This is where the chord moves up a fourth within the scale each time. In C major, it would be Cmaj7 Fmaj7 Bm7b5 Em7 Am7 Dm7 G7 Cmaj7, and of course alterations are often made to the chords themselves. This is sometimes referred to as backcycling, as the chordal motion moves "backwards" in the circle of fifths.

No scale on its own really sounds jazzy. It's down to the application, and a lot of jazz is based on the plain old major scale(though with alterations here and there).
The most popular chord progression in Jazz is II-V-I. e.g. Dm7/G7/CMaj7

Also, look into the Bebop scale.