Speed up website (many pictures)

General information for the website: Interior Design
Kind of development: New website from scratch
Num. of web pages/modules: 5
Description of requirements/features: There are three specific problems:
1) On Firefox the website loads one specific page incorrectly based on the css. My best guess is that there is something wrong with my inclusion of webkit and moz.
2) The most important issue is that the website loads very slowly upon first arriving to the home page, as well as two other pages that have many images inside them. I have already used lossy compression for .jpegs and yet the some of the tabs load quite slowly I need the pages to load much much faster. The landing page takes 19,822 KB (which is hugely costly) and two other pages are worse.
3) Lastly, I do not like the way the website appears in google search. I would like for the meta tags to be corrected and titles to allow for sublinks to appear in google search.
Extra notes: