All / a lot
Words for how much there is: the whole lot, or plenty of it.
zenbu
all; everything
全部 ぜんぶ
Means 'all / everything' for things and amounts. zenbu de means 'in total' (zenbu de ikura?).
zenbu tabeta yo
I ate all of it.
全部食べたよ
zenbu tabemashita yo
I ate all of it.
全部食べましたよ
For people use minna, not zenbu. subete (#732) is the formal, written-leaning variant. Trap: zenbu + negative usually means 'not all of it': zenbu wa tabenakatta = I didn't eat all of it (some is left). For 'none at all' say nani mo tabenakatta or zenzen tabenakatta.
takusan
a lot; many
たくさん
The neutral 'a lot / many' for amounts and counts. It goes straight before the verb with no particle (takusan aru).
mada takusan aru yo
There's still plenty.
まだたくさんあるよ
mada takusan arimasu yo
There's still plenty left.
まだたくさんありますよ
Learn alongside: ippai
ippai
lots; full
いっぱい
Chatty 'loads'. It also means 'full' (onaka ippai) and 'at my limit' (ippai ippai).
mada ippai aru yo
There's still loads.
まだいっぱいあるよ
mada ippai arimasu yo
There's still lots left.
まだいっぱいありますよ
'Onaka ippai' means 'I'm full'. Ippai is a bit more colloquial than takusan. Ear trap: flat ippai = lots / full; ippai with the pitch high on the first i and falling after it = one cup, a drink (ippai nomi ni ikou = let's go for a drink). Before a noun both ippai and takusan take no (takusan no hito).
Learn alongside: takusan