Hi,
1. You don't absolutely need UIM to do this, but UIM could bring you more granularity in the monitoring.
2. Yes, you can do at least "pingable", and if you have an SNMP agent on server, you can do a bit more (like basic CPU, Memory and FS monitoring). If you use the NIM integration you can have a "create ticket" option from a contextual click on an alarm in Spectrum.
3. You need to have the Service Desk integration between Spectrum and SDM turned on, and that's more or less all for basic steps. The Spectrum documentation available on docops.ca.com would give you the standard integration feature. I suggest you have a look to see if that fits the need.
4. docops.ca.com is your best friend!
Best regards,
Christophe