The original (Italian) form of tarot cards would be something rather close to (but not exactly the same as) what is now called the Tarot of Marseilles, and used for gaming. You can see the similarity between a Marseilles tarot and some regional Italian playing cards, including the characteristic layout of the curved swords and straight baton pips. The tarot deck is a modified playing card deck with the addition of a trump suit (and four court cards per ordinary suit). This trump suit has a sequence of characteristic illustrations. There are still regional Italian tarot decks produced in Bologna and Sicily that have a rather traditional appearance. But although tarot remains a very popular game in France, the older standard pattern (Tarot de Marseille) was replaced in the 1800s by a new pattern called Tarot Nouveau (or bourgeois). In tarot nouveau the suits were changed from the older Italian suits to the French (international) suits, and the pip cards are quite plain and look just like the pip cards of a standard deck of cards (but bigger). The traditional motifs of the trump suit were also replaced by rural and urban scenes that no longer make up a sequence in themselves, but now just decorate the numbered cards of that trump suit. It is very easy to find these decks in France. Decks with a similar appearance to the Tarot Nouveau but with shorter suits are available and widely used for gaming in Germany, Austria, and surrounding countries (called Tarock).
Most tarot decks that you will find in the UK and USA follow a parallel development that is based on divination and not gaming, they are descended from the Rider Waite tarot, which mainly follows the structure of the Tarot de Marseille ... the major visual difference is that the pip cards are all illustrated (what in a playing card context would be called semi-transformational illustrations), incorporating the pips into a scene. Of course as the structure of these decks are the same as Marseilles decks it is very possible to use them for gaming if you wanted to do that.
If you're interested in tarot games, you can read about the rules to several, as played in different countries in Europe, on this site:
https://www.pagat.com/tarot/frtarot.html