I am suffering from hair thinning problem. Doctor prescribed hairfil tablets for 2months. Has this tablet got any side effects?

TE lasting for seven months in a male patient with otherwise normal labs is not likely.   You are more likely noticing the early stages of androgenic alopecia which is by far more common.  It is important that you get a proper diagnosis and treatment plan from a specialist in hair loss. 

I agree that microneedling and direct injection of PRP( platelet rich plasma) has been very helpful in men and women.

Yes, traction alopecia thinning or hair loss is reversible if your hair follicles have not been damaged permanently. This includes wearing safer (i.e. looser) hairstyles. Minoxidil may also help by improving blood flow to the scalp. If your follicles have been permanently damaged, hair...

To my knowledge the actual vaccine does not cause hair loss, however, if you have an allergic reaction to it, or your body mounts a strong immune response, you can experience telogen effluvium due to the stress on the body from the immune response. 

There is no relationship between taking finasteride and aging. Finasteride is a DHT blocker that can slow the progression of hair loss. It does not speed up or slow aging. 

At the end of the 30 minutes you may feel a slightly warm sensation to the scalp, but it should not be hot or burning, and you should not develop bumps from it. I would recommend having a follow up with the provider who prescribed the laser cap to you.