Check the website of the new coin with whois
if the dev hide his identity , its no good
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Make another block explorer , don't use explorer posted by dev
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thats a beginning
Yes. Also confirm the Dev's identity. Don't accept IPO or pre-mine.
Ask the Dev for some sort of Mission Statement. If he can't describe why he needs to make a new altcoin instead of joining one of 500 other existing projects, you already know the answer.
Also, be careful of nearly instant exchange listings. This is a sure sign of a pump and dump. With PoS, the Dev is banking on people holding to stake. All the while he's dumping to YOU.
The buyers who are pushing the prices up may be buying MOST of the coins from the Dev. (Either a hidden Pre-mine or a late to show up Block Explorer.)