Usually, 1st engine oil is recommended to be changed earlier, preferably around 1,000 Kms.
Please see and check, what does the owners / users manual say about it? If its mentioned there that it needs to be changed around 1,000 Kms, change it ASAP along with original oil filter. You are already late.
For engine oil grade, for up to 10,000 Kms, you may at max., stick with any 10w-30 or 10w-40 engine oil grade, or as suggested by Toyota, but after 10,000 Kms, you may switch to any fully synthetic 5w-30 engine oil grade from some reputed brand.
Do not go above 5w-30 in any case.
I hope, all above helps and guides. Thank you.