We already know the answers, the Gov published the missile purchase I think last year and they advertise every time one of our ships shoots a missile. They also announce the removal of such and such equipment from one ship to the other during refit to ensure xyz ship has functioning equipment prior to deployment It is either a large ploy to confuse us all or things are in sad state. Either way equipment does not work unless it is turned on and operational.
That's not the way it works. You load and unload missiles depending on any number of factors from the ships readyness, the mission, the ships crew's training and the state of the ammo (might need overhaul, inspection or be expiring as some examples). As for Torps, 57mm and small arms you'll never know what the ship is carrying because of internal magazines.
And of course you don't know the stock in the Ammo Depot, its rotation rate, availability rate and repair rate.
It only takes a single day (maybe two) to fully load a frigate up. No need to always sail with all the ammo if you don't need to.
How well does the equipment work?
As well as it needs to to perform the mission. You can research this stuff yourself on Wikipedia and get a general idea of the capabilities. Suffice to say, for equivalent platforms with other navies around the world the Halifax Class is doing just fine from the combat side.
Does every Frigate have working equipment?
Of course not. Frigates vary from a docking work period where they undergo extensive third line maintenance to high readyness ships on deployment. We take techs to sea to do first line repairs and maintenace in the even something breaks, be that a crane, cable, phone, radio or radar. It's also why frigates have multiple redundancies and work arounds, often within the same system, do you don't lose capability or have a single point of failure.
There's never been any electronic age warship, ever, in the history of the world, that everything worked perfectly. Too much complication and too many different systems for that to happen. Which means this is happening to the "enemy" as well. How we manage these faults caused by high tech equipment in a moving, salt filled environment is why sailors are our most important asset, not the gear. Hell, entire Naval trades exist to manage this natural entropy and keep our capabilities (Combat Systems and Marine Systems Engineers).
All things being equal if a ship can keep higher availability rates on their equipment than the enemy they're starting ahead.
Do they have a full compliment of ammunition and ordnance?
See my first para.
I think I did pretty good to keep to the open source generalities...