RE: Recomended calorie intake
as said impossible to guess...
When your trying to add weight tho I always think you wanna be doing at least the following as a bodybuilder
Whey in water on waking, PWO and a slow release protein like cottage cheese at bed
5 other meals all based around a protein source but including other macros too.
Protein to approx 1.5g per lb of TARGET weight
Use oily fish for one protein source for its good fat content
Minimum 5 portions fruit and veg daily...more is preferable and possible tho
Plan a diet that incluides all food groups with portion control geared to goals..including the odd treat and cheat to keep you sane and focussed.
If you arent doing these things...well, you need to IMO....to me, thats the basic plan to start on