[Mumble-bee]

They're all Transformers toys.

Stranglehold (Pretender, 1989): smaller shell figure in pics 1, 2, 3. Inner robot is the orange & green animal figure in pics 7 & 8. It came with a gray gun & maroon helmet (same color as left arm) for the shell, an orange gun for the animal/robot, and a lavender/light purple piece that was shoulder armor for the shell or a tail-piece for the animal.

Grimlock ((Pretenders Classics, 1989): larger shell figure in pics 1, 2, & 4. Inner robot is the gray & black one in pics 7, 8, & 9. came with a brown helmet & black gun/sword for the shell, and a gray cannon/tailpiece for the inner robot (that the shell could also hold).

White car is Searchlight, a Throttlebot from 1986. no accessories. (pics 5 & 6)

in pics 7 & 8:
yellow car is Flame, a Motorvator -- only sold in Europe in 1991. the red & yellow mini robot (pic 10) is Flame's Headmaster partner/driver. it came with a red sword/gun.

green-blue & red tank/robot is Stalker, a Predator -- only sold in Europe in 1992. It was recolor in a silver scheme as Soundwave for Machine Wars in the late 90's.
came with a radar dish, a weird brown gun, some little green missiles, and a big rocket.

whew!
I didn't know the European ones completely off the top of my head -- I had to look them up using TFU.info which has an ID tool.