Tomato Plants in Pots

Tomato Plants in Pots

Tomato plants are supposed to be three feet apart from each other? Does this mean one tomato plant needs a pot larger then a foot wide? I would like my future tomato plants to bear as much fruit as possible. I have to plant in pots due to living in a studio and only space is the balcony which is fairly large. Does anyone have any pictures of what kinds of pots I should purchase to grow tomatoes and other vegetables?
Plant ID help

Plant ID help

Here we are.

Here we are.

Plant Name

Plant Name

Cherries!

Cherries!

hi!!

hi!!

Mutant coleus

Mutant coleus