Yes, you'll need an aftermarket harness that plugs into the car's wire plug. Then you splice and connect the wires from the Pioneer deck to the wires on the harness you bought. Go to Walmart and pick one up for $10 or less...
You'll also need a dash kit. Walmart should have that also. If they don't, see the auto parts manager and order whatever you need. They are direct seller's of Scoche products.
As for the oem add-on tape player. that cannot work with the new deck. Sorry....