So I noticed that the past few days my 06' range rover sport hasn't been starting as fast as normal... now it wont start.

Can I just buy a new battery for it, take the old one out and put the new one in?
Or is there some security coding that will need to be reset?
Any way you could give me steps that need I need to take to change it?

I noticed that theres a sticker next to the battery that is supposed to explain how to change a battery but there is not text on it, just pictures.
I live about an hour away from the nearest land rover dealer and 5 mins away from a parts store so if anyone can help that would be great.
THANKS!

 

you may have to read the warning in the owners manual before disconnecting the battery.
and this might be a thing where you remove the key and wait for 2 minutes so the Nav system will not be damaged, before disconnecting the system you might also have to start the truck and turn the steering wheel lock to lock to rest the steering sensors,
NOTE dont hold the wheel at the lock just bounce off it