What you ask for is simple but requires a little more knowledge then a newbie. First learn what are the pros and cons of rooting. Then when you think you have learnt enough search for 'root [your model number]' on Google.
If you find that you're a bit hesitant about rooting your LG, Darton, you can disable the offending apps. Disabling them won't free up any space, but when disabled they won't use more than the app itself.