Parts are easy enough to find, and yes, it's most likely been a treadle in it's early life...you may find a spot for a motor mount tho, in which case you can turn it into an electric machine.
She's very pretty, and while the price might have still been a bit high FOR ME, I don't think you were burned either!
Watch the antique/second hand stores for a treadle cabinet for her, you can usually pick them up for less than $75, depending on the shape they're in. If you do, make sure that the treadle parts are all there, and that the pedal turns the wheel.
You can have someone make you a wooden base for her, and you can purchase hand cranks that will fit over the handwheel.
Looks to me like the bobbin carriage is there...it's a drop in bobbin.
Congrats on your new baby...whatcha gonna name her?