The coaxial input on your TV accepts an RF signal and it then has an analog tuner.
What your need is an RF modulator to produce this signal. You then tune the TV to a particular channel (often VHF 0 or 1, or UHF) to pick up the signal.
These are country specific.
One cheap solution is to find an old VCR with an RCA input. VCRs typically had a built in RF modulator to support this type of television.
If you want to buy an RF modulator, then again you need one suitable for your country.
Here is a model for Australia:
http
/www.avaustralia.com.au/resi-linx-rf100-single-input-analogue-modulator/
Models that accept HDMI input usually output a digital TV signal, so you need a digital tuner. These are not suitable.
For the cost of these modulators, you are probably better off looking for a used LCD television on ebay.