Character Change in Platformer 3D

hi all,

i have followed the 3D Platformer game tutorial and i really enjoyed it and i liked very much the lerpz character .

now i am starting a new different game and i need to use a different character , how to do that ? and i hope that someone explains that in a simple way and also is there some characters that can be downloaded for that purpose .

i would really appreciate if someone help me regarding that matter.