From Web-Rover TD5 servicing schedule for post 02 TD5's.
It amounts to:
Engine Oil - renew every 12k miles
Gearbox Oil (MTF94 or equiv) - renew every 24k miles
Transfer Box Oil - check and top up every 12k miles : renew every 24k miles
Front and Rear Axle Oils - check and top up every 12k miles : renew every 24k miles
1/4" drive socket set is pushing it a little perhaps, depends on how tight everything is done up really. I do know a 1/2" Halfrauds Professional socket set does the job admirably.
There's a Torx bit you'll need for the transfer box filler plug - afraid I don't know which one. The older models have tapered threads on the filler plugs for the gearbox, transfer box and axle which will get stuck in if over-tightened - a torque wrench is advisable for refitting them to the correct tightness.