help in removing first touch os from micromax bolt.

hello all,
i recently purchased a new mobile phone micromax bolt q370 , was not aware at the time of buying it that it has another rom apart from stock android which is first touch, and it is quite irritating and slowing my phone.
i am able to disable it, but able to switch it from it to stock android but it again promt me with msg of choosing btw the 2 roms and also while sending txt it is a big time trouble also some pre loaded aaps are consuming much space.
i would like to ask that can i root this mobile to a stock android version?
it is showing that it has lollipop 5.1 installed in it also i would like to ask why i am unable to switch between the apps like my another android phones.

specs of my mobile:-
micromax bolt q370
1.2 ghz quad core
1gb ram
8 gb rom
android lollipop 5.1
this is first time i am going to do any such thing so please guide me accordingly.
also if there is any way i can do this without voiding the warranty of my mobile or is there any way that in near future i can revert back in any case to back what the company offers me to avail the service of warranty?

thank you for the help.

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