No, unfortunately it do not have IR Blaster sensor, as I am a great fan of Vivo phones because of its camera performance but at times I become really lazy to pick remote or look around for same but phone is something which always accompanies me, so I badly needed a phone at a cost effective price range with this feature so I switched to Redmi Note 4, which fulfills my need.
Check the complete details here: Vivo V5
Go to Contacts > Then Select the contact > click on Edit> There you will find the option Notifications and there select desired ringtone.
You can use an app named Parallel Space to create and use multiple accounts of the same app.
Samsung Galaxy J5 Prime vs Vivo V5
Both the phones have their pros and cons, but I think you should go for Vivo V5.
Vivo V5 has the following advantages over Samsung Galaxy J5 Prime:-
1. Vivo V5 has 3000mAh battery while Samsung Galaxy J5 Prime has 2400mAh battery.
2.Vivo V5 has 20MP(Front) Camera while Samsung GalaxyJ5 Prime has 5MP(Front) Camera.
3. Vivo V5 has 5.5" Display Size while Samsung Galaxy J5 Prime has 5.5" Display Size.
Samsung Galaxy J5 Prime has the following Advantages also:-
1. The Weight of Samsung Galaxy J5 Prime is 143 grams while Vivo V5 has 154 grams weight.
Verdict- In my opinion, Vivo V5 is a better phone in overall performance but if you need a light weight phone than you can go for Samsung Galaxy J5 Prime.
You can also see the comparison between the devices on 91mobiles: Samsung Galaxy J5 Prime vs Vivo V5