It's a darn shame about the record changer. Looks like someone forcibly broke the tone arm off its pivot point and left it hanging by the leads.
Oh well; at least they left the cartridge in there (I think that's what is taped to the turntable). Perhaps you could get the changer working well enough to test it just by setting the tone arm back on its pivot and operating the mechanism manually.
These were Magnavox's Micromatic changers, which were very good in their day; they had a very low tracking force (much less than most changers of that era; the ads for Magnavox console stereos and TVs using this changer would make a particular point of what they called a "feather light" tracking touch and also proudly announced that "your records will last a lifetime"). Why anyone would destroy a fine changer like that is beyond me.
It may be quite difficult to find a replacement for the changer, as no one much (except for some of us in the audio forum of AK) listens to records anymore these days.
I would look for a junked console or radio/phono that has a good changer of the proper dimensions to fit your cabinet.
I did not see a radio control panel in your set, although I did see the picture of the amplifier chassis. If this set is strictly TV and phono, it is a rare system as most of these consoles had at least an AM radio tuner in addition to the phonograph.