Change default font and remove bloatware without rooting the phone I have Lenovo S90 and I want to change the system default font and to delete some pre installed applications as well. Based on my initial research, the only possible way on how I can do what I want is by rooting my phone. My system is already running at Android 5.0.2 Lollipop. I was reading online tutorials about rooting this device and found them really troublesome and complicated as I am not a "techie" type of a person.
Is there a possible way that you can suggest with regards tot his matter?  Would appreciate your response a lot. Thank you.
Changing the System font is may be an option without root. A quick Google Search will help with that. 

As for removing (or "deleting" as you put it) System Apps, you must have root, this I can not stress enough. Like @Frank said in the comments, you can disable and app, but this is still on your System and it still takes space.

My advice to you: 


    If you don't feel safe about rooting at this time, don't do it.
    If you hate the pre-installed apps so much (my main reason to first root)
    Make a backup and root away! (Keyword: backup)!


Why you need root:

Mostly to protect the system. Suppose you could uninstall system apps without root. What happens if you mistakenly remove an important part of the system? You now have a broken Android - And imagine if everyone had broken Androids! People would claim Warranty and that cost money, time and effort. That is part of the reason Rooting (as far as I know) will void your warranty.