I like how you describe your whole process 
! Especially day 3.
Must be a pretty fancy cake shop if you need a reservation eh? Now that I’m thinking about it, I have never bought a full cake from a store before, so maybe having to order ahead of time is normal?
Thank you so much!
My thought process was entirely the same!
<stream of consciousness / internal monologue>
Green banner:
Mmm I don’t recognise all the kanji, north something label/tag maybe.
Next section, looking at the red lettering:
こちらのsomething tag/label, エレベーターがございません
In this direction… mm makes more sense that it’s the polite was of saying this, maybe something like this notice, elevator something いません - probably means it’s not working. Maybe polite was of saying there is not a elevator
Bottom line:
something task customer, south something somethingをsomething task please
Map
Think something like
it’s safe to go in the direction of south for customers… head towards the south exit/entrance
ugh need to look up some kanji, I’m going to use a combination of Yomiwa app on my android phone for OCR and the radical look-up on jisho. Oh autocomplete helped out when typing, mm thats a bit cheaty.
改札 - かいさつ - ticket barrier! oh not even close
利用 - りよう - use. Yeah kinda close with that guess
案内 - あんない - guidance, the way. Ack this is in my vocab deck! 
方面 - ほうめん - direction. Oo useful word. I was a bit thrown by the 2nd kanji, ‘direction face?’ I suppose ‘face the direction’
現在地 - げんざいち - you are help. had to do a bit of jisho sleuthing
Ah okay, so its
directions to the southern ticket barrier, elevator using customers,
What are people using for OCR on their Android phones? I’m using ‘Yomiwa’ - it’s okay.
Oh yes, I know that feeling too!
Turning up to the party unfashionably late 
Decided to stop being afraid and just give it a shot, haha.
Please do not bring your pets into this area.
B E A N S
There is no lift at this ticket entrance. Please use the southern entrance if you wish to use the lift.
For customers who wish to use the lift:
Guide for Accessing the Southern Entrance
You are here → northern ticket entrance. Take a left, go straight and take the next left. The southern ticket entrance is on your right.
Christmas Reservations
The deadline for Christmas reservations is December 22nd.
We will not be able to reserve your order, accept phone calls etc., between December 23rd-25th.
Due to limited quantites, all orders must be paid for in advance.
We thank you for your cooperation.
(Yes, I know I moved the “all” at the end there, but it felt more natural! Also in terms of Reserving Your Order™, this is just how I would naturally say “hold your cake for you” in a more businessy sense. I’ve never heard of the word “layaway”, so I learnt something new today!)
Please use the tongs to take your bread.
We ask you not to touch the bags directly with your hands.
(Bit of liberty there because I didn’t wanna reuse please, haha. I don’t know why I’m explaining myself when this is a “Let’s just understand the meaning” thing, but whatever, I’m an anxious soul! Pompadour does have some pretty decent bread. I’ve been to that same one in Motomachi too! 
)
Dear Customer
From January 2023, our store will close every Monday.
2022 → Closed on Wednesdays
2023 → Closed on Mondays
We appreciate your cooperation.
(Change of business days, innit. Cheers for the heads up, Owner-san! I’ll steer clear on Mondays!)
CAUTION
This door may open.
Please don’t stand near it.
Thank you.
Reception for today has ended.
We look forward to seeing you again.
Enjoyed reading all the responses, I seem to have had a more hopeful assessment of the cake situation than most and felt a ready-made cake on display was a possibility. More than likely though, an alternative option for the cake and supplementing it with some additional persuasion like @Asher suggested would probably be required.
Welcome! We’re just getting warmed up!
Your assessment is also totally a possibility, I didn’t even think it might be possible to buy a normal cake on the day to be honest. I am mainly basing this opinion on it being impossible to buy chicken from KFC around Christmas unless you have an order as well haha. I’ve never bought a Christmas cake myself, but I know they are in the same league as KFC when it comes to Christmas. 
I got it with Google translate - Please do not bring pets to this area - but when parsing it out without Google was getting “Pet area accompanied please refrain” so I am not sure what the grammar is that turns it into the actual meaning. But why “Beans”?
Beans is the name of the store where the sign is.
Does the additional information in the sample answer help?
Oh - yes, definitely! I forgot to go back and look at your explanation. Thanks for the heads up!
水 
Good catch! Read it too quickly and wanted to get an answer out before running some errands
They are closed on Mondays instead of Wednesdays
Thanks for posting these up and for all the translations, this is good fun!
Any thoughts? Am I missing something obvious? I usually am.
I could be wrong, but I think a few people at least are using the screen/picture reading function of Google Lens.
I have only used it a few times to be honest, but it usually does the job if there is anything you can’t read.
Never heard of Google Lens before. Is it better than just using Google Translate?
The problem I have with Google Translate when using the camera, is that it does just that, it translates…! But it doesn’t give me the reading. I get around that by using the handwriting function, which I only discovered through this thread this week, which will also give the reading. How about Lens?