Any problem can be solved by communictaio. There are no colors on the picture, you need to assemble and paint it yourself. This can't be avoid, If inner item works ok, this is normal. Color: gray, or light yellow, or milky white.
Painting and Weathering WWII Panzer IV Tanks Techniques for Modelling in Detail
R-Model 35043H 1/35 Metal Track and Metal Pin For WWII Panzer IV LATE type
Tamiya 300035209 1: 35 WWII Automotive 161/1 Panzer IV H Fr (1)
Gunze Panzer IV Ausf G Interior Engine 1/35 Resin Kit G-794 WWII Tank From Japan
Peddinghaus 3D Print 1/48 4141 Panzer III and Panzer IV Track Early Version
Peddinghaus 3D Print 1/35 4154 East Track For Panzer III And Panzer IV Versions