Winter boots, as I said waterproof is the number one priority so something like the black rains (£130-£150)
then summer you can get some race type boots anyway from £90 upwards, I use these
Which are very good for the track days, but perhaps a little over kill for the road, expensive to at about £180-£200 a time, but you can get nice race boots for around £100-£120.
Toe sliders I wouldn't bother with for winter, but summer it's not a bad idea.
Cheers Mark.