"So, my next question is, are engines (slightly) toe-ed inwards on twin engined jets? and are the outboard engined toe-ed in also on all other 4 engine jets?"
Whilst a mind is a terrible thing to lose...I seem to recall (from a long, long, time ago) that the MD-80's engines were toe'd out 1 1/2° (the intakes being farther out than the tail pipes). But my notes are long gone and as I said in the beginning - a mind is a terrible thing to lose! Someone here will have the twinjet answer and correct me quickly, I am sure.