Reinstall One Disk Sata On Pc

on a new pc I tested to install a new disk sata;

ok I installed with using application disk manager 10, but when turned on pc I not see the initial dos screen;

I see directly win xp; (one other pc I have a first step where see for 1 second the dos and where I can, if I want, enter in the bios);
in this new pc I not see this step, so I not know how enter in the bios;

I clicked F10 etc other buttons but not work;

at the moment , after I does some error with acronis for make a dual bootI have this error:
pc not turn on more win xp but have always error mbr;
if I insert a boot floppy I can see the prompt C:
but if I write dir I not see noone files
I have only the dimension of the disk;
if I write format c: not work;

QUESTION:
how I can format all and reinstall
better the sata disk?

and after, the steps for install on a 2nd partition one linux S.O.