In order, L to R:
1 - Crossley, made in Manchester - a large car chassis often used as a commercial vehicle in its 'afterlife'.
2 - American, probably a Dodge
3 - American, possibly a Ford
4 - European, might even be British, but too blurred to accurately know. Could be a large car chassis.
5 - won't enlarge, but looks American.
All locally bodied in Malta most likely.