1. The Cakewalk folks - senior folks - are very frequent participants in this forum, and even more frequent readers of posted threads. They have been seen at all sorts of times that most sane folks are sleeping. They are well-respected for their willingness to invest of themselves as extremely helpful members of the Sonar 'community'.
2. In addition to the are free included tutorials that you seem to have already worked through, there are bazillions of free videos posted by Cakewalk and all sorts of other people, on top of the product documentation and these forums. There are also well-written version-specific books on Sonar, as well as videos for purchase, on all aspects of using Sonar.
3. CTRL+S = Save. CTRL+C = Copy. CTRL+V = Paste. CTRL+Z = Undo. These are standardized Windows key combinations for accomplishing those functions, and are much faster than using your mouse to do the same. There are also standard File and Edit menu tabs at the top of the screen, and other Sonar-specific menu buttons, as well. Available shortcuts are also shown in those menu drop-downs, so if you were to have clicked on File over the past 3 months, you would have seen not only the Save function, but also its shortcut.
Screen real estate was completely redesigned in the 'X' Series of Sonar, and some buttons are either completely removed, or are moved to other pane-specific menu buttons. The above key combinations have existed in Windows, and most applications that run in Windows, for over 25 years now. Sonar 8.5.3 had ZILLIONS of shortcut keys to perform functions, and learning all of those was a bit like attending Hogwarts, but Sonar has followed standard Windows all the way through for normal shortcuts, and the black arts of the other 8.5.3 shortcuts were greatly simplified with the X Series.
4. As far as tempo change goes, you can also click on Project>Insert Tempo Change, to insert one at any point in your project that you wish, and you can have as many of these as you desire. All of the tempo changes present in a given project are shown in the Tempo Map, where you can both view them and change/insert/remove them as desired.
5. Nobody else is reporting sound bank issues with TTS-1, so your issues are almost certainly a result of the steps you are following, or some other problems local to your computer. It would GREATLY help us to help you, if you were to list your computer specs in your forum profile's 'Signature' section, (you can use mine as a model at the bottom of this post. or someone else's if you would rather), and if you also posted a reply with the detailed steps you follow to insert an instance of TTS-1, the associated tracks, etc., we may be able to help you figure out what is going on.
6. The 'Normal' project template for X3 has the Browser Pane visible, on the far-right side of the screen, and if you click on the 'Synth' button at the top of the Browser Pane, you will see the Synth Rack. You can add/remove/tweak synths directly from the Synth Rack, and this is covered completely through the product documentation, the videos, the books, and these forums.
7. An example of the sort of things covered in the documentation is the new 'Comping' feature. Here is a link to Sonar documentation that covers it:
http://www.cakewalk.com/Documentation?product=SONAR%20X3&language=3&help=Arranging.41.html I would suggest you read through and learn how to use that, as it will reduce the need for fumbling for your keyboard or mouse to control the transport controls, and is a VERY useful and powerful set of functionality.
I, and likely others in this forum, will look forward to your posted reply with more information about your system and about the detailed steps when inserting soft-synths, such as TTS-1, so that we can help you get past your current problems in getting presets and general sound to 'work'.
Bob Bone