can i have 3 adsense Ad unit and 2 adsense link unit in a website or its jus 3 ads in total no matter what ?
But using all six ads on a single page will decrease your CPC sharply. So, place ads only on places where it converts well.
Mr Gill makes a good point - I now use no more than 2 ad blocks per page and my income per CPC has gone up. The first ad block the google encounters in your html code is the one it services with the best CPC ads (so I am reliably informed) Dickie