This is an old classic TV antenna called a YUCOLP.
From Kraus Antennas:
It covers the 54 to 890 MHz TV bands:
- LPDA for 54-108 and 174-216, using a trick of bending the dipoles forward so they can work both at $\lambda/2$ and again at $3\lambda/2$.
- Corner Reflector Yagi for UHF giving better gain and F/B than the LPDA would provide there but only from >500 MHz.
It probably doesn't work so well at 145 MHz, but the LPDA part could probably be cut down to work there. The front part is not useful for ham bands without extensive modification. It also looks like it's not assembled with the forward sweep, if it needs it, and one of the elements is damaged.
If you measure all of the elements and their positions we can make suggestions as to how you might modify it. For transmitting I think you will have another problem - the thin wires that make up the boom of the LPDA indicate that it's probably a 300 ohm feed, with some sort of balun/transformer for the 75 ohm coax. This won't work so well for transmitting. A replacement transformer will be yet another thing to design and build.
For just getting on the air, if you want to build your antenna, it would be better to build a simple ground plane antenna. You might still re-use some bits of this one for the metal elements.
