What is the fastest way I can increase my endurance and speed?

Two different goals? The best way to increase your enduance is to run whatever you can comfortably do and increase that amount by about 10% on a weekly basis. That will help you be able to run further. Now if you want to run faster, you must work on speed training. That will involve a combination of short sprints of about 60-90 seconds with 90% intensity and shorter 10-15 seconds sprints at almost top speed.