Took a look at the first save. Some additional observations:
1. Not only are you building walls, which is a big waste of hammers, but you are stunting your capital's growth and working unimproved tiles to finish them quicker. In the time you built the walls, if you had worked the irrigated flood plains, your city would be size 5 rather than 3, and have far more food, commerce, and production. There are 2 primary goals in 'standard' early game development as far as building goes. Get a second city out, and grow your capital to work as many improved tiles as possible. By the point of your first save, your capital should probably be size 6 or 7, and be able to work 2 mined plains hills and a mined forest hills and still have surplus food if necessary. Once that first settler is out, you should work every 4 or more food tile until your capital is at it's happy cap.
2. Related to 1, you wasted time building roads that don't do anything when you could have been building mines (you don't have any yet). Between not growing your capital, and not improving the tiles, you are producing less than half what you could be at this point.
3. As I mentioned before about the tech, you don't need to research everything. You have researched almost every available cheap tech instead of grabbing iron working early. The only techs you needed here before IW were BW and agriculture. Nothing else helped you in any way. Just go straight to alphabet after you get IW, and you can trade for every tech out there.
4. You haven't scouted really at all. Once you have IW, you need to know where the iron is. In your second screen shot you had a horse archer. Well there are 2 very easily reachable iron resources you could have settled. Horseback Riding is an expensive tech that has no use for an early empire that has metals and does not have a horse archer UU.
This is really an incredibly good starting location for Rome ... good food and decent production in the capital, enough food for cities 2 and 3 to be able to have massive production from slavery, and iron very close at hand.