Question 1 - Can I terminate SSL or TLS tunnel on same firewall I am terminating IPSec tunnel?
No, you can't, what you need is a TLS encryption device, such as F5 or BIVIO
Question 2 - Dose Windows Terminal Server needs multiple SSL or TLS Cisco VPN client instances per user to ensure each user session is authenticated?
No
Question 3 - Any special license apart from Security Plus License required on ASA5512-FPWR-K9 to terminate multiple SSL or TLS tunnels?
The basic anyconnect license