"does this mean the chip is from table "C" ???"
Yes, see how fast you learn. Tables are sometimes numbered A, B, C, etc ot 1, 2, 3, etc.

"what does the color mean???: each person gets different colored chips???"
Yes, see how fast you learn.

"how does one collect a full set???"
I will leave this one to the roulette harvestors.