MacBook Pros only have up to 15" presently, though older models had 17". Note: these measurements are diagonal. Larger external displays could be attached to either through the Thunderbolt port, and on some models an HDMI port as well.
In the U.S. Payments are possible. Contact your local store.
It can be overnight depending on stock availability. You really need to look at your local store website.
This is just a user to user forum. iBooks have not been new since the beginning of 2006. If you have any further questions about MacBook Pros in particular please post here:
https://discussions.apple.com/community/notebooks/macbook_pro