Wont start~timing belt issues? after i replaced the serpentine belt.

[oscare003]

ok let me start off by sayin that this past week the car busted the serpintine belt. it still made it home but it was slaping everything under the hood. i replaced it (easy by the way) then wifey drove it 2 work for 2 days. the morning after it didnt start. it only made a winding noise. i couldnt work on it till today. well it was a gear inside were the timeing belt is at. it fell inside the plastic. i put it back. checked 2 see if the car would start and...NADA
i know theres some lines u have 2 line up on the bigger gears but i couldnt find it on here. anyways it wont start. sooo ima find a mech 2 fix it. most likely looking 2 replace the timing belt/ tensioner/ water pump. but it may be alota $$$$ ill get some quotes and get back to yall.

Question?~
any one else attempt this? what em i missing on putting the timing belt back on?
HELP PLZ

serp belt snap pic





These pis are of the gear that fell off and the timing belt