Do I have to put the pay on it?
You do not, and you will get fewer and worse applications. No number is read as the low end of whatever they were imagining.
What if the hours vary?
Say the range and the pattern. Flexible on its own reads as unpredictable, which is the thing people leave jobs over.
Should I ask for a CV?
Not on the first form. Name, phone and a line about what they have done, then ask for whatever else you need in the reply.
Where else should the page go?
In the window, on the receipt, and in the bio. It is one address, and it is the same one on every one of those.
Can I take applications when nothing is open?
Yes, and say so on the page. A good chef with nowhere to send their name is one you never hear from again.
How many jobs should be on it?
All the ones that are really open. A page of three vacancies looks like a business that is growing; a page of eleven looks like one that cannot keep anybody.
Does this replace a job board?
No, and it does not have to. It is the page the board's ad links to, where the detail lives: what the contact page carries.