Nobody can predict the future performance of any ULIP/Pension Plan. But be realistic and estimate 10% return on the amount invested every year.
What do you mean by Home loan or critical illness cover?
What is covered / what is not? can be checked only after reading the policy document. Please take some time and read it.

If you want to surrender the policy -
1- Surrendering in 3 years - This would make it very costly as you have already paid high front-end charges to the insurer. Post 3 years the charges are less and therefore you build up units at a lower cost. If you don’t want to keep paying premium, check with customer care of the insurer, if you can continue policy in 'premium holiday' mode.

2- Buy adequate Life Insurance before surrendering old policy.
3- Check Income tax provisions