after 10 year ILR and I have visa not expired more then year

[Gadanas]

I would like to ask about indefinite leave to remain after 10 year ILR.
1 - I have the right to apply for ILR in 30/3/2019. I have Tir4 visa it will be expired in 29/04/2019.
My plan to apply visa Tir4 In 28/01/2019 .

And then I will apply for ILR in 30/03/2019.
My questions do i have the right to applay for new Tir4 visa and after that few month (After 2 months ) later applaying for ILR befor tir4 visa expired.?
2- how i will get the ILR visa is it as card or sticker in my passport?, do i have the right to ask only for acard not as sticker. ?
3- can I do living in uk exam before applying application one year .does has expired date ?
4- what document i need to prepare for submit ?
Thank
Gada