I would imagine your looking for square taper.. Just look at the hole in the crank arms.. It should be square... So ignor any octalink, hollow tech etc.
68mm is the width of your bb on the frame.. They only come in two widths so it's 68mm or 73mm. Yours is a 68mm.
It's an orange so it's going to be English thread.
Un followed by number is basically the kit level very rough rule of thumb the higher the number the better the kit level. Bb for some reason didn't get labelled stx, xt, xtr. Unless your being weight picky then don't worry to much about that bit.
The other important bit is the 113mm which is the width of the axel going thru the bottom bracket.
So too recapp you just need to look for a square taper, English thread , 68mm x 113mm
If you look aT this link you will see all the options that can vary size wise and see the one that suits you.