idk about a kick serve but the basic ball toss for a flat serve is.....hold your tennis racquet straight up...in other words reach for the sky with your tennis racquet in your hand and at the top of the frame is how high your toss should be
this is the most common way but it may vary such in Andy Roddick's case but not every serves like Andy Roddick
and i can't be certain on this and correct me if i am wrong but it seems the kick serve is the same hight but i know you toss it toward you dominent side if you are a righty toss it sorta behind you or over you toward your right
and for a normal serve your toss is a bit out in front of you
but if you are having trouble with your serve i wouldnt be try to learn a kick serve
there is a drill to help you and you can practice this anywhere lay your racquet on the ground where if you would let your toss fall to the ground that it will be in the same place each time so toss your ball and let it fall and try to let it fall in your racquet
here is a sight check out the serve helps
http://uspta.com/index.cfm/MenuItemID/1644/MenuGroup/New-USPTA-Education.htm