1 SSD 120 GB

I have a laptop with a 1tb hdd but I am thinking of buying at least a 120gb sdd for faster boot time however I am not so sure if my laptop is capable of that. So, Can I use both the hdd and sdd? Also, can I add a RAM? This is my laptop ASUS Vivobook X540UP...

So I currently have: Crucial Ballistix S XT 8GB 1866Mhz DDR3 Gaming Memory OCZ Vector 150 120GB 2.5' SSD Intel Core i7-4790K Processor 4.00 Ghz 8MB Cache - Socket 1150 Gigabyte Z97-D3H ATX Motherboard - Socket 1150 WD Caviar Green - 1TB SATA 3 Gb/s 64 MB Cache And a 500W 80plus bronze PSU...