Driving NTSC (RS170A) or VGA are quite different and neither is particularly easy.

If you Google on the toshiba display you'll find
http://www.compsys1.com/workbench...6963c.html
is the first hit. That shows a character display, which seems, indeed, to use an 8-bit data bus, but seems to work like many other character LCD's.

Why you would want to replace a $2, easy-to-interface, character display with a $200, difficult-to-interface, monitor is not clear to me.

I think you need to study the specification for NTSC-formatted video signaling, and you need to spend some time learning how it is timed, and how bipolar transistors and jfets and mosfets work, take a course in electrical engineering, and, above all, read up on what a 74HC245 is, what it does, and how it works. You'll quickly see that most of the work is not done by the 74HC245.

If you look at a typical '80's generation IBM Color or VGA adapter, that will show you how many and what sort of parts you'd have to have in order to build what you want. There are simpler ways of building primitive NTSC-compatible raster displays, but these LCD's are an effort at getting away from the power-hungry, costly, and relatively fussy CRT displays into something that's easy to use, stingy with power, and low in cost.

Maybe I could be of more help if you'd indicate what your goals are. From those perhaps we can help you derive some system requirements and devise a reasonable approach from there.

RE