Jokers and Marbles Game (Brown, 4-8 Player)

How do you set up for only 2 players on Jokers and Marbles?

Could I add more players if I buy two sets? I grant there are only so many colors in the rainbow, but... big family.

I received the 4 player game, can I buy extra paddles for more people ?

If i want order to order more marbles what size should i order for this game