1955 Peugeot 403 ( HELP NEEDED! )

I am currently working on a Peugeot 403, It was supposed to be based on Columbo's car from the TV show Columbo but I scraped that idea and want to go for a more clean and restored look. I have done the modeling but I need help with the JBeam, Textures, Interior, etc. It may not be the best mod as I am fairly new to all this modding business.

View attachment 126734
View attachment 126735

I need ANY help available, the model was made with 3DS.

Thank you very much much for...

1955 Peugeot 403 ( HELP NEEDED! )