i am almost finished with my first attempt at designing a website but i would
like to post 2 ebooks as giveaways on my site, so far i have not been able to
figure it out, i am sure it is simple to someone who knows. the other question
is will my merchant account provide visitors that purchase my product an id
and password

the other question is will my merchant account provide visitors that purchase my product an id and password

Absolutely no idea.

but i would like to post 2 ebooks as giveaways on my site, so far i have not been able to figure it out, i am sure it is simple to someone who knows.

You probably need some server side code to handle the requests, or you simply upload and link to them and anybody can them download them.