When i bought my secondhand ML7, two of us lifted into the back of a Renault 16, (so that tells you how long ago).
Since then Two of us (males – me + not he same chap each time) have lifted the machine on four or five occasions.
Last time was 12 years ago, when I sold it, and helped install it in the new home.
The only thing with a ML7 with motor is that the headstock end is WAY off balance, so holding the motor is a job for one of your hands whilst the other supports the headstock. But it can be lifted and carried. Obviously, if you can load it onto a truck of some sort , moving distances is easier than carrying (until you find it too wide to fit through the doorway!)
A Norton box may help the balance, but will make the headstock end heavier.
If you can borrow / hire a small crane, removing the chuck, moving tailstock away from the chuck as far as possible , before slinging and lifting (fitting a steady there as well may help) will help balance end to end. But it will be desperate to capsize, so do keep at least one hand on, or an additional ratchet strap or something, to stabilise it.
Do be careful lifting from/ or lowering to, a low starting point; osteopaths get rich that way.
Summary: as long as you are both reasonably fit, awkward but not impossible.
Yes do protect the car floor with hardboard (minimum) or ply is better.
When in the final position, DO level carefully. Myford beds are not rigid, so you need to be very careful fixing down so that there is no twist between headstock and tailstock. Won't matter if the headstock is higher or lower than the tailstock, but any twist and it will never turn parallel. Even an extra nip on a holding down bolt will affect the twist.
Have hours of fun afterwards!
Howard