Warnock, 63, was confirmed as the club's new manager on Saturday following the recent sacking of Simon Grayson and the former Sheffield United and QPR boss has already identified areas that need strengthening.
"The chairman was supportive when I spoke to him. He knows I feel we need two or three players if we can get the right ones to supplement what we've already got," Warnock told the club's official website.
"Gwyn Williams will be trying as well to let one or two players go out, as will my staff.
"Ideally I'd love to get somebody in before the weekend. I do feel there are areas we have to improve if we're not to write this season off. I don't want to write this season off, not just yet - even though the bookies aren't giving us much opportunity.
"One of the reasons for coming was because there's an opportunity there. The size of the club is geared for that situation. It's fair to say that the squad has to improve, but there are a lot of players here so they have to prove it at the same time. The challenge is there."
Leeds last week