Yes there are places for lunch. The eateries are frequented by locals and market stall holders as well as tourists, so you may have an interesting lunch if you so desire.

I'd say early morning - it's scorchingly hot later on. And they are closed Sundays.

Is there a lot of walking as I have bad knees and wife bad back. We are able to walk say several blocks

I believe that is the old guy who sits in the inner market. You have to go through the small sales area ,which has side corridors with all kind of vendors. When you follow through to the end, which is about 150 feet ,you reach the inner circle, where they eat their lunch or just talk with each other. It is not much for the tourists ,rather for the sellers of the items around the circle area. Just ask around this circle for BIG G? and see if can come up with an answer. This would be the area to find him.

Sorry don't know...........I was there over Christmas and it was certainly closed on the Bank Holidays, I would GUESS it will be open on Saturday and closed on Sunday.

It appears that there are at least two craft markets, both within 2-3 blocks of the cruise ship landings. On foot, the first is a city block of tasteful, single-story stuccoed, tile-roofed structures housing vendors--we did not visit that one, assuming that they were focused on the cruise ship trade and probably more expensive. Nearby, perhaps a block farther from the boat landing, is a more typical sheet-metal warehouse close-packed with more vendors in narrow aisles. Adjacent is an open-air farmers' market, and behind the building are hole-in-the-wall food vendors with outdoor seating along a block-long alley. It's a pleasant place to spend a couple of hours shopping and having lunch.