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:acton/follow/takesb‘sadvice=dowhatsbsuggests;apiece/abit/afewwords/awordofadvice.
如果没有it,则and句失去主语,it在此代指alotofmoney,否则,and的主语变成you就说不通了.eg:Youhavetodump,andrunfast.句中,and前后的主语都是you.Youhavetofollowhisadvice,andneitheritisright.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.