An archive page is a normal/static page that you manually create, which you also place a “Collection List” component. The previous link/button is also a a link that you manually place to link to a third similar page if you have such a page. How many items you choose to display on that page using the “Collection List” is up to you.
It’s up to you. See ► [LIST] Feature Availability & Limits
Let’s not use the word “days”, instead, I’m referring to the number of items that can be displayed using the “Collection List” component, which is 0 - 100 items.
I have no idea what you mean by this. Please attempt a basic example first using the tutorials
Intro to the Webflow CMS - Webflow University Documentation
Collection list - Webflow University Documentation