What should a new photographer price his first photos at?

Well there is no straight answer as to how much should a person charge , but here is what I do :

If I am renting the equipment I will add the cost of that, I will see how much time I am investing in the whole process, I will do a pre-assessment as to how many pics will I click for the photo shoot.

If the amount of shots required for the shoot is quite high I will do the Shutter Count check, Everytime I press my shutter that is 2-10 usd of my income, the more picture I take the more money I will charge, on the top of everything I will charge if I am going to travel + money for electricity +computer usage. I will relax on amount of work I will put in to make the pics beautiful, I will also check the prices of other photographer, just to make sure I am not going above and beyond.

So inshort..there is no hard and fast rule to figure out the amount of price, You can do it for free if you want to. But then in order to take money, take it slow and you will be there eventually.

all the best.