Check out http://www.hdsht.com
Here are some basic notes on how to play Trolls:
I played with a Capo on the 3rd fret. I'm a cheater :)
Basic Riff / Verse
C/Cadd9 Am7 G/B (G chord without the bass E string) Cadd9 Fmaj7
And the chorus:
Dm C Fmaj7 G/B Cadd9 Fmaj7
Dm Am7 G/B Cadd9 Em Fmaj7
And finally, the bridge:
Am7 G/B Cadd9 Fmaj7
Am7 G/B Cadd9 Fmaj7
You can find all of these chords at http://chordfind.com/ I am using the root voice of them all. The only difference you'll find is when I play Fmaj7, I use my thumb on the 1st fret of the low E string rather than not playing that note at all.
Hope that helps get you started :) I use my thumb to pluck the bass of the chord, then use my index/middle finger to play the top 2/3 notes of the chord and then mute the strings with my palm, which gives that percussive sound.