I am new to ebay, and I have placed items on to sell, the items are on for auction however I have had enquries about items all being purchased for a buy it now option can I do this or do I have to continue to sell the items individually?   Please help

You have a few options . . . but first of all you need to be sure the person wanting to buy them all for Buy-It-Now is genuine.

You can end your listings and then relist all the items in one fixed price listing with an agreed Buy-It-Now price that you are happy with (with no auction format).  However, if the buyer doesn't come thorugh then you have done all that for nought.  If they hit the buy-now and then don't show to pickup then you will have a delay before you can relist them as you will need to either cancel the transaction OR do an UnPaid Item claim (UPI).

You can add a Buy-It-Now price to each of your listings and request that they hit the Buy-It-Now button on each.  This would get you four seller feedbacks instead of one (but it would only count as one on your feedback count).

As you are new to selling, be sure of how you proceed and come back here to ask questions or clarify things e.g. which payment method is best?  The answer being CASH ON PICKUP after the items have been inspected by the buyer and they agree to purchase.