clutch and brake operation

I am about to start the restoration of a series 2a landrover. I know it needs lots of chassis work but whilst I am there it's best to do other jobs if they are needed. So here is the problem both the break and clutch pedal just go flat to the floor, the engine runs but I can't think how to test the gear box etc without actually driving it (and to be honest I wouldn't mind taking it round the field once before a restoration that is bound to take 3 to 6 months)
My question is then this, do I have to replace or reconditoion existing slave and or master cylinders to do this or is there a way of getting them back working by a bodge just for a day or so? I could of course by new bits but am told when out of use for several months they often go wrong.
I am relable told by the previous owner that she arrived fully working as was parked at his yard but has not moved for two year.
any advice as evey would be greatly appreciated

Is there hydraulic fluid in the reservoirs? You could try topping up and bleeding the clutch to see if it will work. If the seals are gone the master and slave cylinders can be overhauled if the bores are OK, probably a better option if they're Girling than buying pattern bits.
If you can get it running you probably won't need brakes!

Going round a field you might be able to get away without brakes, if theres no inclines.
Topping up and bleeding the clutch as mentioned will probably get it working at least for a while, if the clutch slave is knacked then it would be worth the expense of buying a cheapo pattern cylinder just to do the test drive with, 20 quid for a drive round a field before a resto would be 20 notes well spent.

My SIII clutch lost pressure this week, I thought I would be changing the master and slave cylinder this weekend, but last night thought I'd bleed the clutch just in case that worked. It did! A load of silty black, watery grey fluid out, golden Dot 4 in and the clutch is working fine. Worth a good bleeding as a first stop.

you can refurb the master and slave cylinders on the clutch if the bores are good use a genuine LR seal kit,

the brakes may be similar problem with the seals if bleeding dosent work

you an try the gears (after checking oil levels ) by putting the transfer gear in neutral and then using the main gearbox as usual, you wont move and dont really need the clutch working!