well you won't be riding it much without pedals.
repainting it to original will cost, to get it right will require skill, time and money. the biggest possible hurdle will be the graphics I think. masking and exact color match just after that.
it can be done.
better investment in money would be to find another Tempo is better shape. Not easy but still cheaper.
Then you will have two and can experiment with one and have the other for reference.

I would take it apart, clean it, do any touching up with the frame apart.
Neutralize the rust on the top tube cable guides, mask them off and prime and paint those with a spray can.
Testors won't get you to that color.
It will be mixing time or mixing with another brand, possible Duplicolor from the auto parts store.
With the bike apart, that the fork with you unless your color memory is perfect.