Shopify website update by coding

I need some updates on an already existing shopify website:

LANDING
- Add a section
- every "buy now" button should be accompanied by the price of the product (I attach the image!!). Meaning all collections (plants and gardens) and also Plant collection page and garden collection page.

VARIETIES COLLECTION PAGE "PLUGS"
- price should appear (like the image attached)
- Products should show "sales" and "new" tags when needed. the same image is attached.

VARIETIES PRODUCT PAGE
- Need some changes, will do a message specifically on that later

GARDENS Collection
- I would need to be able to edit the order of the sections, just like in the landing.
- Price, "sale" and "new" tags should appear on top of the "know more" button. Like image previously mentioned
- Related products should appear

GARDEN PRODUCT PAGE
- I need the 4 colors showing on the "garden collection page" but I'd like to have the possibility to change color in the garden product page. I did this by adding the color variant in all 4 garden products but I'm not sure it's the best option. What do you think? if you don't understand, please tell me.

FOOTER
- I need the font to be smaller.