I believe that although you've got a TD4, it may still be to early for a 'standard' ODB2 reader - and even if it did work, it may not give you ABS readout.
I think the lowest cost unit that will work on a 2000 TD4 is a iCarSoft unit - I think i930. Its about £100. It is a hand held unit, I don't think you can hook it up to a PC/tablet to customise the interface.
I'm not absolutely sure though.