get a set of Power Grips - for most of us they're probably as effective for pedaling efficiency as automatic (aka "clipless") pedals. They really work well and are easier to use effectively than cages and straps because they "tighten" automatically and are easy to "release" out of.

For shoes, if you find your runners don't cut it, get some walkable cycling shoes, depending on your budget. Later when you get automatic pedals, you can add the cleats to them.

Ease your old man into it. This is a good compromise for you - he won't automatically think they're dangerous even though they probably have similar + and - to clipless.