Can i stake and get rewards using the CTSC core wallet?
Yes you can. You need to unlock the wallet in the main menu "settings -> unlock wallet" and then just check the box "For staking only". It will take a little while for your coins to mature and start staking, you will know the coins are staking once the CTSC icon in the bottom right corner of the wallet goes green. The wallet need to be running 24/7 and must have access to the internet.