So in essence, you'd need three sets of the box of zombies set 1 to be close to the original box set ($20 x 3)... still missing the abomination ($10 ebay). Then there's the survivors ($20 ebay or $25 for the ultimate versions). Then the tile pack ($20). Finally, the rulebook, which can be downloaded for free.
However you are still out the cards, token board, and dice (dice are easily replaceable as they are nothing excusive).
Adding this up it's somewhere around $110 without the cards or token board, I'd just buy the game as you can find it around $70. The original Zombicide is hard to beat!
How much would each of the different parts of the game cost? It's variable, supply and demand, especially if getting it used. You can probably get it quite cheap, if you can find a homeless owner of the game who is trading parts of the game for food or spare change.