advice当用于表“劝告,忠告,建议”等名词意义是,为【U】,即不可数名词,而suggestion,则是可数名词,有复数形式suggestions.
常用搭配有：act on/ follow/ take sb‘s advice=do what sb suggests；a piece/ a bit/ a few words/ a word of advice.
如果没有it,则and句失去主语,it在此代指a lot of money,否则,and的主语变成you 就说不通了.eg：You have to dump ,and run fast. 句中,and前后的主语都是you.You have to follow his advice,and neither it is right. 句中it是指advice,当然,因为advice是不可数名词,所以要用it 而不是they替代.
希望能够帮助到你.