Hey Asalamualykum brother
Don't worry about the past - don't trouble yourself too much that it stops you from doing good today and don't forget about your bad deeds completely that it makes you ignorant and forgetful about the hereafter....(have a balance in sha Allah)
Once you've learnt how to perform salaah correctly In sha Allah try and make up for the salaah's you have missed.
In response to question 1 i believe you can only pray in Arabic. I've never come across an individual who prays the compulsory salaah in their own language (unless your making a personal dua) I could be wrong am not sure what the islamic stance is - sorry.
Question 2 - That's right, you make an intention either in your mind or verbally to Allah swa - for example fajar salaah - You make the intention ya Allah, i am praying my 2 sunnah's/2 faraz for my fajar salaah and then start your salaah in arabic....(I say this in my mother's tongue and not in arabic).
Question 3 - There are certain things which make the wuzu invalid - for example, going to the toilet, performing a sexual act with your spouse, sleeping, vomitting, laughing out loud in salaah, bleeing etc. Withe every wuzu you perform you remove the minor sins (Allah knows best) so it's pretty cool if you refresh your wuzu for each salaah in sha Allah.
Please listen to
Question 4 - The jummah salaah is only prayed on Fridays - This is only for men and not the women - am sure the brothers will be able to give you more info in sha Allah (or visit your local masjid) don't be afraid to ask the imaam!
Question 5 - When it's time to pray it's time to pray - we are not excused for delaying or missing the salaah - we have to pray when we hear the azaan or at the appointed time in sha Allah. If you miss your salaah (for example the days of ignorance it is encouraged to make up for this salaah - but some scholars state you will still be punished either way - Allah swa knows best).
If you visit this website
http://www.kalamullah.com/videos.html
Scroll right at the bottom there is a video called - Pray As You Have Seen Me Pray - in sha Allah it'll be useful for you.
Also visit http://www.kalamullah.com/my-prayer.html which gives you a Step By Step Guide To Salah
I have found a useful video on youtube which shows you how to perform your wuzu
Wishing you all the best