Quote: 1. I am planning on using PC Mover Express to move my files. I have read that it will not move programs though. The software was a free download, but an upgrade to pro is available that will move the programs too for $30. I am thinking of doing that. I have many programs that I am not sure how I would reinstall otherwise.
I have no experience with PC Mover. I've "ghosted" drives using Acronis True Image but that takes the operating system along with it, and you definitely don't want Vista on your new PC.
Quote: 2. Should I go with the SSD? Or should I get a much bigger second standard internal HD?
If budget isn't a major concern use the SSD. Windows and other software will start much faster. Add a conventional hard drive for storing photos and video.
Quote: 3. I am thinking that for my old photos, that I could purchase an external case for my 2TB drive, and connect that via USB?
Yes, that should work. USB enclosures are often slower than internal drives, but if you're only periodically loading old photos and videos (rather than doing large data copies) it should be okay.
Or, if you are going to be opening the new system to install the SSD, see if you can fit your old hard drive in there too.
Quote: 4. The current software I use for editing are Lightroom 3.4, and PS Elements 6. I am not an expert with them. When using Elements, I stick to simple stuff, mostly the guided edit stuff. If I go to the Adobe monthly plan, will I be overwhelmed?
If you aren't interested in the full Photoshop the monthly plan is questionable value. (not bashing on Adobe; $10/month is IMO great for LR+PS but only if you actually use both programs)