Yes, you can.
If the vinyl is down tight , the answer is YES, Laminate con go over it
You shouldn't use any wet products on laminate floors.
Remove the laminate floor first
You should not buff a laminate floor.
Laminate floor cannot be refinished. It will have to be replaced. Hardwood flooring can be refinished.
yes you can but remember it is not designed for excessive or standing water contact.
No, laminate is floating type of floor installed over an insulation pad. Hardwood floor has to be nailed, stapled or glued to the subfloor. If you do manage to install hardwood on top of laminate sooner or later your Laminate floor will expand due to high temperature or humidity and it will create gaps between hardwood planks.
A lot of laminate cleaners are just vinegar and water. The key though with safely cleaning the floor is to not putting a lot of cleaner on the floor. Put the mixture into a spray bottle. Spray the floor floor and clean up with a terry cloth mop.
If your laminate didn't shine out of the box, nothing will really shine it. A clean floor shines more then a dirty one. Use a good laminate cleaner, like Pergo's.
If you are installing a floating laminate floor, you can easily put it right over the tile.
Steam cleaners do not lift varnish or shrink polished floor boards. The whole idea of applying varnish to a floor is so that the floor will be protected from moisture or liquid being absorbed by the wood.