ICO development questions

[marketorder]

I have a few questions about ICO's on how they determine ICO price and how ICO's raise money

1. If you had an ICO with 100,000,000 total coin supply what would be a fare ICO price per token and why?

2. Can you raise money in BTC and then send the ICO tokens to the investors who buy the ICO tokens at a specific price per token, for instance the tokens ICO price is 0.05 cents someone buys 100 tokens for $5 worth of BTC. Once the Investor buys the token with BTC the ICO dev sends the 100 tokens to the investors Ethereum wallet and the dev keeps the BTC for development cost? 

3. Once ICO has ended what would establish the coin value right away? Essentially the coins initially have zero value before they get to the exchange right?

4. How would the first sell order price be established and how would the first person selling the new token on the exchange come up with a price to sell at?