My Altis 1.6 was also parked for around 6 months and I hardly completed 2k kms on an engine oil having a range of 10k kms, but I get the engine oil changed anyways. So, its better that if your car is parked or moving occasionally and it's been around 6 months, so its best to get the oil changed.
Secondly, as you said that your Altis 1.6 is just 12800 kms on ODO meter, so I don't think that you need to do any other maintenance, just got the transmission oil, brake oil etc. inspected from any 3S Toyota dealership and I think that you will be okay, however, going a long country wide trip, its best to get the wheel balancing and alignment of your car and you're good to go.