あげるから

I'll give you ...; I'll ... for you, so..., I'll do it for you

→ 上げる
phrase Rare #32,591
I'll give you ...; I'll ... for you, so... Often expresses an offer or promise followed by から, meaning “because I’ll...” or “I’ll..., so...”. In 手をあげてから, あげてから is a different form meaning “after raising,” not this phrase.
JA: 荷物を持ってあげるから、先に行って。
EN: I'll carry your bag for you, so go ahead.

半分あげるから

I'll give you half.

— तुम्बाड (2018)

あげるから

I’ll send it now.

— ファニーゲーム (1997)

ねぇ母さん運んであげるから私に命令する時は恐ろしいしなさい

Hey, Mom, I’ll carry it for you… When you give me orders, you need to make a terrifying face.

— サイコ (1960)

あげるから

I'll give it to you, so...

— तुम्बाड (2018)

phrase Rare #32,592
I'll do it for you あげる indicates doing something as a favor for someone, while から adds the meaning “because” or “so.” The phrase often reassures someone that the speaker will take care of something for them.
JA: 荷物、私が持ってあげるから。
EN: I'll carry your bag for you.

探してあげるから戦車どこに置いたんだ

I’ll look for it, so where did you put the tank?

— ライフ・イズ・ビューティフル (1997)

こっちに来て見せてあげるから

Come over here, I'll show you.

宗介僕が守ってあげるから

I'll protect you, okay?

— 崖の上のポニョ (2008)

大丈夫だよ僕が守ってあげるから

Don’t worry, I’ll protect you.

— 崖の上のポニョ (2008)