Sounds like you need to start by bleeding your brakes and clutch. Best to flush both systems with new fluid as well. Check the fittings and parts for any leaks. Parts that can go bad and leak are brake calipers (front), brake cylinders (assuming your D has drums for the rear), brake lines, brake master cylinders, clutch master and secondary cylinders.
I recommend dropping $50 for a power bleeder as it makes the job so much easier -- especially if you have never bled hydraulic systems before. Does anyone know if the cap on this bleeder fits on a LR?
Search YouTube for "how to XXXXX" videos to get an idea of what is required.