Where are all the metrics?

Solution 1:

To see all kind of information about workers, shoppers, jobs etc but also about your residents, click on the Population count bar (roughly in the middle of the toolbar on the lower edge of the screen, it shows how many residents your town has). There are two tabs, open the second one (forgot the name), there you will find a table of all workers grouped by their wealth class. In the table you will see how many workers there are in each wealth class, how many are commuting from other towns in the region, how many are commuting out into the region and also how many jobs there are for the respective wealth classes. There more more tables pertaining to commercials and industry.

To see water/power usage, click on the respective tool (as if you wanted to build a power plant or water tower). With the tool selected, on the right-hand side you will see a gauge with red/yellow/green zones. If you hover mouse over this gauge, the tooltip will provide information about production/usage/import/export and excess of the respective resource. Analogically for sewage, garbage etc..

Solution 2:

Here's residential agents housed.

  $  Low (1×2)    4w   2sh   2st
  $  Mid (1×4)   40w  20sh  15st
  $  Mid (2×4)   40w  20sh  15st
  $ High (4×4)  400w 200sh 100st

 $$  Low (1×2)   2w   1sh    2st
 $$  Mid (4×4)  20w  10sh   10st
 $$ High (4×4) 200w 100sh   50st

$$$ Low  (4×2)   2w   1sh    1st
$$$ Mid  (4×4)   7w   3sh    4st
$$$ High (4×4)  70w  33sh   30st

You can determine the worker, power, and water stats for any building you control by toggling the power and comparing the city overall stats. Those stats are updated instantly for capacity. Pause the game, turn a building off, write down the city stats for workers (population->details), power (power plant menu) and water (water pump menu), then power the building on and recheck the stats.

There are also worker stats for many of the buildings you don't control at this other question.