@phillip1882,
It all depends on what kind of game you're playing, ie. friendly family game or not.
1. No idea what you mean by standard time settings. Do you mean how long you have to play your turn? See above.
2. If you take one too many, you shuffle them up, close your eyes, choose one and put it back. Again, see above.
3. How could there be a dispute about the score? Each player adds up the points and the other(s) check it.
4. Blanks always count for nothing. In my experience, at least. They have no number on them.
But really, you should try Google.
https://scrabble.hasbro.com/en-us/rules