1999 Land Rover Freelander Clicking sound

Hi,

I have bought a car and after a few weeks I noticed a clicking sound, one single click, following a change of gears (getting going from 1-2). It has now progressed to also making a single or two times, click when I take my foot off the accelerator after acclerating in the getting going stage.

It sounds motion based, if that makes any sense, it happens at the point where the cars momentum halts for a moment after moving forward.

Do you have any idea what this is?

Have had some other issues :

1. Power steering fluid leak - resolved with that stop leak / power steering fluid combo
2. Right indicator bulb and reverse lights out - replaced globes

Currently
1. Clicking sound
2. Brake light coming on intermittently while driving particularly up hills - I understand this is probably low brake fluid so I'll top that up tomorrow.
3. Air con - can hear fans running and the sound increases appropriately as the dial setting is turned up, however only a very tiny amount of air comes out and is warm.

I hope you can help as I am a girl and I can't afford to get done by a mechanic at the moment. Was quoted $140 for the indicator and reverse lights which I fixed myself in 15 mins for $6.80 after watching a utube video.