Is there an exchange that allows to send multiple different coins to the exchange,
to addresses associated with a users account?
all altcoin exchanges does that.
so i can send coins to alot of coins at an exchange and all the coins will go into my account at the exchange?
yes. but keep in mind if their different coins each one will have a different deposit address.
but you can use the same exchange BTC address and send btc from anywhere there yes
idk if i fully understand you, maybe a sub-forum for your first language is a better place to ask?