All my toy cars, lorries, tractors got either thrown out or given away a long time ago. I had big chest full of them.
I had a few model bikes whilst I was at college, mainly Tamiya plastic kits (NSR250, VFR750, FZR750, CBR1100XX), and a couple of Minichamps diecasts (Rossi's 2000 NSR500, Ducati 999). Sadly they all got broken when we moved and I couldn't be bothered to fix them.
I've still got all my Lego, but that's not been touched for a good few years and probably won't get used until my nephew is old enough to play with it as it's mostly Technic.