are there any American Universities which offer graduate courses based upon TOFEL scores only

I very much doubt it!! Even if they did, you would have to question their integrity surely.

Hi!
I actually know a girl from my same university (Trieste, Italy) who managed to find a PhD in the USA with neither GRE or TOEFL...
Naturally you won't managed to be accepted in the most famous universities, but it IS possible to find a position!

i want to do p.hd in usa in life sciences please help how i can get into phd