Classic Rib panel has a coverage of 3'. 80' divided by 3' = 26.66. You'll need 27 panels at 14' long. Make sure the panels are installed over a solid substrate or wood framing with a slope so that water runs off the roof.
When you are side-lapping multiple panels on a roof or wall the coverage width for the panel is 36". 1 Classic Rib Panel, by itself, is about 38" wide.
It depends on which measurement is the eave of the building. Panels have a coverage width of 3 feet. 10 meters is about 33 feet. (33 divided by 3 is 11). 11 panels at 8 meters long. Or 8 meters is about 26 feet. 26 divided by 3 is 8.66 (rounded up to 9 panels) at 10 meters long.
If you are just covering the 24 feet then you would need 8 sheets
When you are side-lapping multiple panels on a roof or wall the coverage width for the panel is 36". 1 Classic Rib Panel, by itself, is about 38" wide. The same width for all lengths.
Sorry I don't have the information to answer this question. Snow loads are different per region and areas. You'll have to check your local codes for detailed info. You can reference Metal Sales website for panel section properties of the Classic Rib Panel.
"Single Bead Tape Sealant" is used at the sides laps. Search for that on the Home Depot site. Also search for "metal sales wood screws". They have a piercing tip to penetrate the metal panel then grab a hold of the wood structure.
Panels have a 3' coverage width so if the panels need to be 14' long then you take 20/3=6.66 or 7 panels at 14'. The Home Depot ProDesk can help you further with flashings and accessories.
For panels longer than 14' you'll need to visit your local Home Depot ProDesk. They can help you determine the flashings to use. You can order panels cut-to-length down to the nearest inch, along with flashings and accessories to complete your project in additional colors.
It's hard to answer that question without seeing dimensions of the roof. There's a lot of different ways to get to 1000 sq ft. Take the eave dimension in feet and divide by 3 (coverage width of the panel). That will give the number of panels needed. The length of those panels will be the length from eave to the high side.