RCU Forums - Need Advice

I know i already have a post, but the pics were wayyy too big(my bad). Here's my dilema. I was given 2 gas cars. One of them looks pretty beat down, well they both do but one worse than the other lol . I don't know much about these cars. The last R/C car i had was a R/C 10 and that was about 15 years ago. The car that i want to fix needs a clutch or so i was told. I will post pics. First off can someone tell me if it's worth fixing and 2nd, what exactly i need.

I uploaded 3 pics, 1 is of the car i want to fix and another pic of the motor and what's missing. The other pic is of the P.O.S car. My cousin told me the motor on it is good?