restoring suburban 1958 need help

[Q.8]

hello guys i hope all off you in good health.

i just bought a 58 chevy suburban clam shell doors,i don't have experience in such car type so i need some help

1-does it came originally without backup lights?

2-any sources for parts? even new or used,,coz searching not helping me very good

3- i think some 58 trucks parts will fit the suburban (such doors,windshield and front end ) is im ryt?

4-some photos in the internet i saw one round red light in the middle of the back door what is that for?

5-going to update it to PB and PS so any good sources that can help?

any more info or pics are more than welcome

thanks alot