I've had this account from a close friend of mine,he used to trade and do stuff like that.Now,the problem is I dont know where to use Monero, thats the reason I want to exchange this account for Bitcoins.Those interested send me a pm,I need Bitcoins and this account has been sitting there for some time.
I don't get it, you said if your friend used to trade with that account, why he gave his trade account to you then? (his balance (75 XMR) still in his wallet too).Why i assume if that's your friend money? because you are saying you don't know where and how to use monero (deposit and withdraw too).
Why not sell the coin on the exchange?
Yes, this is the best way. You can easily sell those XMR in almost all exchange sites, like Poloniex, C-Cex, Bittrex.
If you still want to sell those coins on here, you must sell it under market value to attract pot buyer (Use escrow).