There are 3 "diamonds" per rail for a total of 18.
Table salt is edible, for human use - pool salt no.
It is a pocket billiards table, but during the 1920's men would "pool" their money for betting, hence the name pool table came to use. The common term used today is "pool table".
Foot spot. This is directly in line with both the second diamonds from the foot rail and the center end diamonds.
The diamonds were introduced to the billiards table in France. All tables that are properly constructed will have the diamonds in the same locations, whether American, French, English or others today. The diamonds are first used to mark or divide the table for center, foot, and head. During play, the diamonds are used using different methods to calculate bank shots. There are more than 100 diamond systems to do this.
There is only one dot on a pool table. This dot goes ay yhe intersection of two imaginary lines - the center of the table, lengthwise, and, the imaginary line between the second diamonds on the side rails at the racking end of the table.
No. Pool table felt is a specialized felt designed specifically for pool tables. There are many variations of table felt and each will react differently with the balls, and each has a differnt lifespan on the table. Use of felt not designed for pool table use will result in poor play at best, and will quickly be destroyed at worst.
No, if a pool table is not configured as a 6 pocket pool table it is not a pool table today.
The billiard table diamonds, which are often dots rather than diamonds, are placed on the rails to divide the table. The foot string, head string, and table center are found by using the diamonds. In addition, they can be used to determine bank shot calculations. Their distance from playing surface points allow them to be used for more accurate aim and calculations for difficult shots. There are more than 100 published "diamond systems" to calculate bank shots using the diamonds.
Sure. Go for it.