Susa said:
1. Is my spouse be eligible to sponsor me?
Yes. There is no specific income limit and your own skills can be taken into account to convince the VO that you won't require social assistance.
Susa said:
2. I am Indian and stay in Oman but the processing time taken at AbuDhabi is about 20 months as compared to 10 months at New Delhi. Can I apply from New Delhi?
Yes. If there is an interview (unlikely) you will need to travel to India. When they are ready to issue the visa, you will have to travel to India (the whole "you cannot send your passport via mail" issue for India). You do NOT need to send your passport at the beginning when they ASK you. You only need to send it when they tell you that you MUST submit it in order to issue the visa.
Susa said:
3. I spoke to one of the prospective employers who earlier provided me the appointment letter (in 2011). The employer is still ready to hire me provided I have legal status to work. If I use same letter or get a new provisional appointment letter can it accelerate the application of spousal sponsorship?
No. But if the employer can obtain an LMO, you can obtain a closed work permit and the employer can hire you. Then you could even apply via the inland route if you so desire.
Susa said:
4. In case of provisional appointment letter should I go for the temporary work permit or continue with spousal sponsorship. Which option is better?
These are parallel tracks: if you can obtain the LMO, then you can come to live and work in Canada while CIC processes your application. Spousal sponsorship is one way to achieve PR.
Susa said:
5. Is there any other way to expedite in order to be in Canada permanently?
You might check and see if there is a PNP program for family sponsorship for your intended province, but in general spousal sponsorship is the
fastest class of application, though not always. I do know that the new FSW track is supposed to be very fast, so you might investigate going by that approach. It's still too new for us to know how fast it really will be though.
Good luck!