haha... diet can control ur weight.
but cant give u muscles. =.=
hahaha... u need to lift hard to get ur muscles dude.
u cant just sit and watch ur diet, without lifting.
perfect diet aint giving u any muscles.

hahaha dumbell alone at home aint gonna help u much. =.=
u have to go to a gym.
even a ghetto gym which accepts per entry.
some maybe rm5 per entry?
well, yes... hit the gym hard, and control ur food well.
eat well, lift well, rest well = look great

hahaha... =.=
ok let me explain. hope i can. =.=

5 reps means, buat lima kali.
5 sets means 5 set.
each set u do 5 reps.
so in total 5 sets = 25 reps.
get it?
how heavy to lift or squat?
u should do as heavy as u can do 5 reps for each set.
means on the 6th rep or so, u barely have enough energy to complete 6th rep.

F=failure... means do until u cannot do. =.=

thats like a gals weight, and u r taller than those gals. =.=
well, try rippetoe, and u got to eat a lot to gain more weight.
maybe some ecto can explain how they manage to increase their weight.

rice is one of the highest carbs, u can gain lots of calories from there i assume. rice are indeed ur plan to go with.