Qui est à côté de toi means 'who is next to you' in English. Là (with the accent mark) means 'there'.
Assieds-toi means 'sit down'.
I think you mean «toi aussi», which means "you too"
Tais-toi means 'shut up / be quiet' in French.
"Toi tu gères" in French means "You are in charge" or "You are handling it". It is a way to acknowledge someone's competency or ability to manage a situation.
sit down or have a sit
Assieds-toi means 'sit down'.
from you
Assieds-toi means 'sit down'.
Decris-toi translated into English from French means"describe yourself".
it means "you too "
and you too
Stand up
"You" (singular form), in the predicate of a sentence.
on return to you
Because it is you.
your eyes (it should be - tes yeux)
and the same to you