Check the silly stuff first. Are you leaving the lights on or something plugged into the cigarette lighter. You'll be amazed how fast a SatNav can drain a battery. How old is the battery? Some batteries can only last about 5 years especially if the vehicle is used every day. Check the condition of the battery and the alternator. Get a good garage to test the battery 'under load'. This is where they test the voltage with the engine running. This will tell you if it is a worn out battery or an issue with the alternator.
If they are OK you could have a wiring short somewhere that is draining the battery.
First check the bulbs. Both fog lights are usually on the same fuse. The fuse box is under the dash, at knee height on the drivers side. the panel usually pulls loose at the top and hinges down. The Fog lights are Fuse 12 at 5 Amp.
*Note* Only replace fuses with the same colour and Amp rating.
The pollen filter in mounted inside the car in the passenger side footwell. Remove the lower kick panel. It is held in with push clips that can be gently hooked out with a screwdriver. Once the panel is out there is a black plastic casing up under the dashboard. There should be a long rectangular cover that will slide sideways and come free. This should reveal the filter. Slide the old filter out noting which way around it is and slide in the new clean filter. Replace the slide panel, refit the kick panel and push the retaining clips firmly until they click into place.
Wiring, schematic, electrical diagrams, fuse diag, error codes, torque settings etc are basic contents of these online books they have here on this website www.reliable-store.com I have attached. Must check it out
Your throttle body is dirty. It can be a do-it-yourself project but you have to be very careful to not break anything or forget to put hoses back where they go. Cars are similar and YouTube has several videos showing how. You can watch one and see if it's something you want to tackle even tho' there are none I can find specific to your car.
Here's one
HOW TO CLEAN THROTTLE BODY AND SAVE
Need new heaters for the starting ,as for the emmisions light then this is another problem ,on the exhaust is a NO2 filter abd its blocking up ,whet you need to do is add a bottle of diesel injector cleaner ,dont read the instructions just add a bottle to half a tank of fuel or more and then drive at legal speed limit for half hour or so and this should clear it out if it doesnt ,wait till fuel level goes down and refill and another bottle it will clear the filter out eventually .Now if the heaters dont cure the starting then fit a non return valve on the fuel inlet pipe as well
