Custom build of arduino on a pcb
Can I use ----THIS---- part instead of the basic 22pf capacitor and the big 16Mhz crystal?


No. That is just a crystal. You still need the capacitors.  If you want a single device then you need a ceramic resonator.

Also you're lacking any decoupling capacitors in your circuit. You may find it works for now, but it will become flaky when you start getting it to do things.